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All questions of February Week 3 for Class 10 Exam

Pick the odd one out:
  • a)
    Tiger
  • b)
    Cow
  • c)
    Lion
  • d)
    Wolf
Correct answer is option 'B'. Can you explain this answer?

Shubham Basu answered
The Odd One Out: Explanation

Introduction: The given options are Tiger, Cow, Lion, and Wolf. We need to identify the odd one out among these four options.

Tiger: Tiger is a wild animal that belongs to the cat family. It is known for its strength, speed, and agility. Tigers are carnivorous animals and they hunt other animals for food.

Cow: Cow is a domestic animal that is widely used for milk and meat production. It is considered as a sacred animal in India and is worshipped by Hindus.

Lion: Lion is a wild animal that belongs to the cat family. It is known for its majestic appearance and is referred to as the 'King of the Jungle'. Lions are carnivorous animals and they hunt other animals for food.

Wolf: Wolf is a wild animal that belongs to the dog family. It is known for its hunting skills and is often associated with howling at the moon. Wolves are carnivorous animals and they hunt other animals for food.

The Odd One Out: The odd one out among these four options is Cow. The reason for this is that Cow is the only domestic animal among the given options whereas the other three options are wild animals. Moreover, Cow is herbivorous and does not hunt other animals for food unlike the other three options which are carnivorous.

Conclusion: Therefore, the correct answer is option 'B' Cow, as it is the odd one out among the given options.
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National Consumer Day is celebrated in India :
  • a)
    24 December
  • b)
    25 December
  • c)
    26 December
  • d)
    27 December
Correct answer is option 'A'. Can you explain this answer?

Krishna Iyer answered
 Every year, 24th of December is observed as National Consumer Day in India. The theme of 2019 is “Alternate consumer grievance/dispute redressal”. On this day the Consumer Protection Act, 1986 had received the assent of the President and came into effect.

A card is drawn from a well-shuffled deck of 52 playing cards. The probability that the card will not be an ace card is​
​a)12/13
b)1/4
c)3/4
d)1/13
Correct answer is option 'A'. Can you explain this answer?

Ananya Das answered
Total no. of outcomes=52
No. of ace cards=4
No. of non-ace cards=48
Probability of getting a non-ace card = No. of favourable outcomes / total no. of outcomes
=48/52=12/13

The probability that a leap year has 53 Sundays is​
  • a)
    3/7
  • b)
    2/7
  • c)
    4/7
  • d)
    1/7
Correct answer is option 'B'. Can you explain this answer?

Ananya Das answered
There are 366 days in a leap year, i.e, 1 more than a normal year.
Now, 52 weeks make up 344 days (52 x 7 = 344)
That means that we already have 52 sundays for sure.
Then, we are left with 2 days. Now, these days can be any from a pair of- mon-tues,tues-wed,wed-thurs,thurs-fri,fri-sat,sat-sun,sun-mon. Here favourable cases are sat-sun and sun-mon i.e, 2 cases and total number of cases is 7.
So, Probability=number of favourable cases/Total number of cases.
Therefore, Probability= 2/7.

Which is not a function of PDS ?
  • a)
    Control Hoarding
  • b)
    Control Prices
  • c)
    Control over charging
  • d)
    Consumer Redressal
Correct answer is option 'D'. Can you explain this answer?

Kiran Mehta answered
The consumer redressal is the right given to the consumer to meet the consumer court regarding any wrong practises done by the producers such as adulteration which affect human health and hence it is a right given to consumers as a result it is not the function of the public distribution system(PDS).The public distribution system helps in the distribution of food grains from the Godowns to rationshops.

A bag contains cards which are numbered from 2 to 90. A card is drawn at random from the bag. The probability that it bears a two digit number is:
  • a)
    88/90
  • b)
    88/92
  • c)
    81/89
  • d)
    89/90
Correct answer is option 'C'. Can you explain this answer?

Pooja Shah answered
Total number of outcomes=90-1=89
No. of favourable outcomes = Total outcomes - One digit number =89-8=81
Probability of having a two digit number=Total number of outcomes/No. of favourable outcomes=81/89

World Consumer Rights Day is celebrated on ?
  • a)
    5 March
  • b)
    10 March
  • c)
    15 March
  • d)
    20 March
Correct answer is option 'C'. Can you explain this answer?

Shipra Rekha Acharya answered
The consumer movement marks 15th March with World Consumer Rights Day every year, as a means of raising global awareness about consumer rights and needs.

An urn contains lottery tickets numbered from 1 to 100. If a ticket is selected at random, then the probability that it is a perfect square is​
  • a)
    0.1
  • b)
    0.08
  • c)
    0.09
  • d)
    0.01
Correct answer is option 'A'. Can you explain this answer?

Ujjwal Kumar answered
Dude see....from 1 to 100...there is 10 perfect square number.

so, ur fav. number of out comes = 10.
nd number of total outcome = 100.
so....probability will be...no. of fav outcomes divided by number of total outcomes.

i.e., 10/100 => 1/10 => 0.1.

hope uh got it.

Pick odd one out :
  • a)
    Right to safety
  • b)
    Right to life
  • c)
    Right to consumer education
  • d)
    Right to representation
Correct answer is option 'B'. Can you explain this answer?

Amit Kumar answered
Of all the available fundamental rights, the most fundamental is the Right to Life. . Article 21 guarantees the protection of life and personal liberty to every individual and states that, "No person shall be deprived of his life and personal liberty except according to procedure established by law.

ISO stands for :
  • a)
    International Organization for Standardization
  • b)
    International Standards Organization
  • c)
    International School Organisation
  • d)
    International Standardisation
Correct answer is option 'A'. Can you explain this answer?

Raghav Bansal answered
ISO stands for International Organization for Standardization which is an international standard-setting body composed of representatives from various national standards organizations.

A bag has 9 red, 7 green and 4 blue balls. A student randomly selects a ball from the bag. The probability of not getting a blue ball is
  • a)
    4/5
  • b)
    7/20
  • c)
    1/5
  • d)
    9/20
Correct answer is option 'A'. Can you explain this answer?

Vikram Kapoor answered
Total number of balls in the bag=9+4+7=20 balls
No. of favourable outcomes=not getting blue ball= getting either the red ball or green ball=9+7=16
Probability of not getting blue ball = no. of favourable outcomes/total number of outcomes=16/20=4/5

Consumer Complaint forum is called ?
  • a)
    Consumer forum
  • b)
    RTI
  • c)
    High court
  • d)
    Police Station
Correct answer is option 'A'. Can you explain this answer?

Anjana Khatri answered
The consumer movement in India has led to the formation of various organisations locally known as consumer forums or consumer protection councils.

Following are the importance or functions of consumer forums

(i) They guide consumers on how to file cases in the consumer court.

(ii) On many occasions, they also represent individual consumers in the consumer courts.

(iii) These voluntary organisations also receive financial support from the government for creating awareness among the people.

(iv) It works for the protection of the consumer rights.

(v) It imparts knowledge about consumer rights by writing articles and getting it published in newspaper.

MCQ (Multiple Choice Questions) for Practice with Solutions of Chapter "Consumer Rights" of Economics (Understanding Economic Development) of Class 10 SST (Social Science Studies)
 
Q. A consumer :
  • a)
    Sells goods and services
  • b)
    Buy goods and services
  • c)
    Produces goods and services
  • d)
    Delivers goods and services
Correct answer is option 'B'. Can you explain this answer?

Pooja Shah answered
The consumer is the one who pays something to consume goods and services produced. As such, consumers play a vital role in theeconomic system of a nation. Without consumer demand, producers would lack one of the key motivations to produce: to sell to consumers. The consumer also forms part of the chain of distribution.

The probability that a consonant is selected from the English alphabet is
  • a)
    21/26
  • b)
    1/26
  • c)
    1/2
  • d)
    5/26
Correct answer is option 'A'. Can you explain this answer?

Ruminating Friend answered
Consonants are those English alphabets that are non-vowels. So there are 5 vowels out of 26 alphabets. Thus there are (26-5)= 21 consonants.
So correct probability will be
P(getting a consoant) = ²¹/₂₅.
This is why A is the correct option.

A die is thrown once. Find the probability of getting a number that is either composite or prime.​
  • a)
    4/6
  • b)
    3/6
  • c)
    6/6
  • d)
    5/6
Correct answer is option 'D'. Can you explain this answer?

Vikas Kumar answered
The possible outcomes when a dice is thrown = {1, 2, 3, 4, 5, 6}

Number of possible outcomes of a dice = 6

Prime numbers on a dice are 2, 3, and 5.
Composite numbers on dice = 4, 6

Total prime numbers on a dice = 3
Total composite numbers on a dice  = 2
So, total (prime + composite) = 5

Probability of getting a number that is either prime or composite = 5/6

In a given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level ?
Grass → Grasshopper → Frog → Snake → Hawk
  • a)
    5 kJ
  • b)
    50 kJ
  • c)
    500 kJ
  • d)
    5000 kJ
Correct answer is option 'D'. Can you explain this answer?

Surbhi Gupta answered
According to 10 percent law, 90% of the energy captured from the previous trophic level is lost to the environment and only 10 percent is made available to the next trophic level.

In this food chain, at the 4th trophic level, 5 kJ energy is available to the snake

⇒ Energy available to Frog = 10% of 50 kJ

⇒ Energy available to Grasshopper = 10% of 500 kJ

⇒ Energy available to Grass = 10% of 5000 kJ.

 A fair die is cast in the game of ‘Ludo’. The probability of getting a score greater than 6 is
  • a)
    1
  • b)
    1/6
  • c)
    zero
  • d)
    2/3
Correct answer is option 'C'. Can you explain this answer?

Ananya Das answered
A fair dice has number 1,2,3,4,5,6 only . So there are no number greater than 6
No. of favourable outcomes=0
Total no. of outcomes=6
Probability of getting no. higher than 6=No. of favourable outcomes/Total no. of outcomes=0/6=0
 

COPRA does not propose formation of :
  • a)
    National Consumer Court
  • b)
    State Consumer Court
  • c)
    District Consumer Court
  • d)
    High Court
Correct answer is option 'D'. Can you explain this answer?

Ananya Das answered
Copra is a rule regarding the protection of consumers from the violence it doesn't propose the formation of high court because

1) high court deals with the criminal and it is a criminal court
2) there are very no of cases pending in the high court
3) as a consumer doesn't want to file case in any criminal court because there decisions came very long and the could not get the redressal at time
4) for fighting their case a person must need his or her personal lawyer which could cost much
5) for awaring consumers consumer society or consumer court Is needed so that they get their redressal and could get justice

A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in
  • a)
    green plants
  • b)
    man
  • c)
    birds
  • d)
    fish
Correct answer is option 'B'. Can you explain this answer?

Avinash Patel answered
  • A food chain comprising birds, green plants, fish and man.
  • Food chain in ecology, the sequence of transfers of matter and energy in the form of food from one organism to another organism.
  • Food chains intervined locally into a food web because most organisms consume more than one type of animal or plant.
  • Each level of a food chain represents a different trophic level.
  • Humans are to be present at the top of the food chain because they eat all kinds of plants and animals.
  • The human food chain starts with plants.
  • Humans are dominant consumers.
  • They affect food webs through energy production and agriculture, pollution, habitat destruction, overfishing and hunting it affect both soil and aquatic ecosystem.

Which group of organisms are not constituents of a food chain?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper
  • a)
    (i) and (ii)
  • b)
    (iii) and (iv)
  • c)
    (ii) and (iii)
  • d)
    (i) and (iv)
Correct answer is option 'C'. Can you explain this answer?

Krishna Iyer answered
The organisms in an ecosystem are related through food requirements. This relationship is called food chain. In option (i) grass is eaten by rabbit, rabbit is consumed by wolf and lion eats wolf. In option (iv) grasshopper eats grass, frog eats grasshopper, snake eats frog and eagle consumes snake. In option (ii) grasshopper is found in terrestrial ecosystems not aquatic ecosystems. In option (iii) there is no herbivore animal to consume grass. Thus, the correct answer is option C.

Causes of consumer exploitation ?
  • a)
    Right to Information
  • b)
    Proper Supply
  • c)
    Low literacy
  • d)
    High literacy
Correct answer is option 'C'. Can you explain this answer?

Rajiv Gupta answered
Consumer exploitations is a situation in which a consumer in cheated or given false information by the producer. The factors which causes exploitation of consumers are:
(i) Limited information Consumers have limited
information about their rights and duties. Therefore, they get exploited by dishonest sellers.
(ii) Low Literacy and awareness The lack of knowledge about the quality or prices of various products or illiteracy causes exploitation of consumers.
(iii) Limited competition Markets do not work in a fair manner when producers are few and powerful and consumer and scattered and purchase less.

The probability of getting a number less than 5 in a single throw of dice is
  • a)
    1/2
  • b)
    2/3
  • c)
    5/6
  • d)
    1/3
Correct answer is option 'B'. Can you explain this answer?

Beauty Dubey answered
Number less than five in a dice is 1,2,3,4
P(E) = Number of favourable outcomes / Total number of possible outcomes.
= 4/6 =2/3.

In a throw of a die, the probability of getting a prime number is​
  • a)
    1/2
  • b)
    6
  • c)
    3/4
  • d)
    3/2
Correct answer is option 'A'. Can you explain this answer?

Anjana Khatri answered
The possible outcomes when a dice is thrown = {1, 2, 3, 4, 5, 6}

Number of possible outcomes of a dice = 6

(i) Prime numbers on a dice are 2, 3, and 5.

Total prime numbers on a dice = 3

Probability of getting a prime number = 3/6 = 1/2

Adulteration is :
  • a)
    Selling defective items
  • b)
    Overpricing
  • c)
    Underweight measurement
  • d)
    Mixing cheap materials
Correct answer is option 'D'. Can you explain this answer?

Amit Kumar answered
Adulteration is a legal term meaning that a food product fails to meet the legal standards. One form of adulteration is an addition of another substance to a food item in order to increase the quantity of the food item in raw form or prepared form, which may result in the loss of actual quality. Food is adulterated if it omits a valuable constituent or substitutes another substance, in whole or in part, for a valuable constituent ; conceals damage or inferiority in any manner ; or any substance has been added to it or packed with it to increase its bulk or weight, reduce its quality or strength, or make it appear bigger or of greater value than it is

One card is drawn from a deck of 52 cards. The probability of drawing a black card is
  • a)
    1/52
  • b)
    1/2
  • c)
    1/4
  • d)
    1/3
Correct answer is option 'B'. Can you explain this answer?

shubham answered
There are total 52 cards which consist of 13 suits each of club,spade, diamond and heart.Out of these club and spades are black card and, heart are dimond are red cards. So there are total 26 black card and hence the probability of getting a black card from the deck of 52 card is 26/52=1/2

Pick odd one out :
  • a)
    Right to information
  • b)
    Right to choice
  • c)
    Right to adulteration
  • d)
    Right to redressal
Correct answer is option 'C'. Can you explain this answer?

Kiran Mehta answered
Right to adulteration aims at standardizing. The awareness of being a well-informed consumer which arose out of consumer movement has also shifted the responsibility of ensuring quality of goods and services on the sellers.

Which of the following statements about food chain and energy flow through ecosystem is false?
  • a)
    Food webs include two or more food chains
  • b)
    All organisms that are not producers are consumers
  • c)
    A single organism can feed at several trophic levels
  • d)
    Detritivores feed at all trophic levels except the producer level
  • e)
    The lower the trophic level at which an organism feeds, the more energy available
Correct answer is option 'D'. Can you explain this answer?

Gaurav Kumar answered
There are many food chains which are interconnected to form the food web and so one organism can feed at different trophic levels in the different food chain. There is a 0gradual decrease in the energy of the increasing trophic levels due to the loss of energy with each transfer. The producers are the organisms which can synthesize food and the organisms which feed on the other sources are known as consumers. The detrivores are the organisms which feed on the dead matter of the organisms which belong to all the trophic levels. 

Pick the odd one out :
  • a)
    BIS and ISI
  • b)
    ISO
  • c)
    HALLMARK
  • d)
    CID
Correct answer is option 'D'. Can you explain this answer?

Raghav Bansal answered
The other three are name of the important signs or marks to look on various objects for assurance of quality.

A bag contains 3 white and 5 red balls. If a ball is drawn at random, the probability that the drawn ball is red is​
  • a)
    3/8
  • b)
    5/15
  • c)
    3/15
  • d)
    5/8
Correct answer is option 'D'. Can you explain this answer?

Nk Classes answered
Explanation: Total number of balls = 3 white + 5 red = 8 balls.
The number of red balls = 5.
Probability = (Number of red balls) / (Total number of balls) = 5/8.
So, the correct answer is Option D.

Excessive exposure of humans to UV rays results in
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers
  • a)
    (i) and (ii)
  • b)
    (ii) and (iv)
  • c)
    (i) and (iii)
  • d)
    (iii) and (iv)
Correct answer is option 'C'. Can you explain this answer?

Madara Uchiha answered
UV Rays as the name suggests Ultra Violent rays causes a lot of harm to our body and to our environment like :-
1. temporary/permanent blindness
2. skin cancer
3. faster evaporation of water which leads to drying of leaves(Forest Fire)
4. infrastructural damage
and so on

Excessive exposure of humans to UV-rays results in
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcer
  • a)
    (i) and (ii)
  • b)
    (ii) and (iv)
  • c)
    (i) and (iii)
  • d)
    (iii) and (iv)
Correct answer is option 'C'. Can you explain this answer?

Gaurav Kumar answered
UV rays or ultraviolet rays can affect human health in many ways like causing skin cancer or weakening immune system. Excessive exposure to UV rays can lead to skin cancer because the UV rays cause damage to the DNA in skin cells. 

In the garden ecosystem, which of the following are producers?
  • a)
    Insects
  • b)
    Snakes
  • c)
    Grasses
  • d)
    Rabbits
Correct answer is option 'C'. Can you explain this answer?

Hitakshi 💞💞 answered
Green plants (grasses) are autotrophic. They perform photosynthesis by using solar energy to synthesize their own food. Hence they are the producers in an ecosystem.

Out of a day’s production, which is 1000 machine parts, 100 were found to be sub-standard. The probability that a part selected at random being up to the standard is
  • a)
    1/10
  • b)
    7/10
  • c)
    9/10
  • d)
    2/10
Correct answer is option 'C'. Can you explain this answer?

Shambavi menon answered
Understanding the Problem
In a day's production, the total number of machine parts produced is 1000. Out of these, 100 parts were found to be sub-standard. We need to determine the probability that a randomly selected part is up to standard.
Calculating Total Standards
- Total parts produced: 1000
- Sub-standard parts: 100
- Parts that are up to standard: 1000 - 100 = 900
Calculating Probability
The probability of selecting a part that is up to standard can be calculated using the formula:
Probability = (Number of favorable outcomes) / (Total number of outcomes)
In this case:
- Number of favorable outcomes (standard parts) = 900
- Total number of outcomes (total parts) = 1000
So, the probability is:
Probability = 900 / 1000
Simplifying the Probability
Now, simplify 900 / 1000:
- This can be simplified to 9 / 10.
Conclusion
Thus, the probability that a randomly selected machine part is up to standard is 9/10.
The correct option is:
- c) 9/10
This means there is a 90% chance that a part selected at random is of good quality.

Three unbiased coins are tossed. What is the probability of getting at most two heads?
  • a)
    7/8
  • b)
    3/8
  • c)
    1/4
  • d)
    3/7
Correct answer is option 'A'. Can you explain this answer?

Gowri Mehta answered
Understanding the Problem
When three unbiased coins are tossed, each coin can land on either heads (H) or tails (T). We want to find the probability of getting at most two heads.
Total Outcomes
- The total number of outcomes when tossing three coins can be calculated as follows:
- Each coin has 2 possible outcomes (H or T).
- Thus, for three coins: 2 * 2 * 2 = 8 total outcomes.
Possible Outcomes
- The possible outcomes when tossing three coins are:
1. HHH
2. HHT
3. HTH
4. THH
5. HTT
6. THT
7. TTH
8. TTT
Counting Favorable Outcomes
- We need to count the outcomes with at most two heads:
- 0 heads: TTT (1 outcome)
- 1 head: HTT, THT, TTH (3 outcomes)
- 2 heads: HHT, HTH, THH (3 outcomes)
- Total favorable outcomes for at most two heads:
- 1 (0 heads) + 3 (1 head) + 3 (2 heads) = 7 outcomes
Calculating the Probability
- The probability of an event is given by the formula:
Probability = (Number of favorable outcomes) / (Total outcomes)
- In this case:
Probability = 7 / 8
Conclusion
- The probability of getting at most two heads when tossing three unbiased coins is 7/8. Therefore, the correct answer is option 'A'.

Three face cards of spade are removed from a well shuffled pack of 52 cards and a card is drawn from the remaining pack. The probability of getting a black face card is​
  • a)
    12/50
  • b)
    7/49
  • c)
    3/49
  • d)
    9/50
Correct answer is option 'C'. Can you explain this answer?

Neha Patel answered
If 3 face cards of spades are removed
no of total possible outcomes = 52-3=49
1)a black faces card=E
no of favourable outcomes = 3
p(E)=no of favourable outcomes/no of total possible outcomes
=3/49
2)a queen=E
no of favourable outcomes=3
p(E)= 3/49
3)a black card=E
no of favourable outcomes=26-3=23
p(E)=23/49
4)a spade=E
no of favourable outcomes=13-3=10
p(E)=10/49

If a grasshopper is eaten by a frog, then the energy transfer will be from
  • a)
    producer to decomposer
  • b)
    producer to primary consumer
  • c)
    primary consumer to secondary consumer
  • d)
    secondary consumer to primary consumer
Correct answer is option 'C'. Can you explain this answer?

Anup mishra answered
The energy transfer in this scenario would be from a primary consumer (grasshopper) to a secondary consumer (frog). The grasshopper is considered a primary consumer because it eats plants, which are producers. When the frog eats the grasshopper, it is consuming the energy that was obtained by the grasshopper from the plants it ate. Therefore, the energy transfer is from a primary consumer to a secondary consumer.

All the three face cards of spade are removed from a well shuffled pack of 52 cards & card is drawn from the remaining pack. Find the probability of getting a black face card.​
  • a)
    12/50
  • b)
    3/49
  • c)
    7/49
  • d)
    9/50
Correct answer is option 'B'. Can you explain this answer?

Neha Patel answered
If 3 face cards of spades are removed
no of total possible outcomes = 52-3=49
1)a black faces card=E
no of favourable outcomes = 3
p(E)=no of favourable outcomes/no of total possible outcomes
=3/49
2)a queen=E
no of favourable outcomes=3
p(E)= 3/49
3)a black card=E
no of favourable outcomes=26-3=23
p(E)=23/49
4)a spade=E
no of favourable outcomes=13-3=10
p(E)=10/49

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