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DSSSB TGT/PGT/PRT Exam  >  DSSSB TGT/PGT/PRT Tests  >  DSSSB PGT Chemistry Mock Test - 5 - DSSSB TGT/PGT/PRT MCQ

DSSSB PGT Chemistry Mock Test - 5 - DSSSB TGT/PGT/PRT MCQ


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30 Questions MCQ Test - DSSSB PGT Chemistry Mock Test - 5

DSSSB PGT Chemistry Mock Test - 5 for DSSSB TGT/PGT/PRT 2024 is part of DSSSB TGT/PGT/PRT preparation. The DSSSB PGT Chemistry Mock Test - 5 questions and answers have been prepared according to the DSSSB TGT/PGT/PRT exam syllabus.The DSSSB PGT Chemistry Mock Test - 5 MCQs are made for DSSSB TGT/PGT/PRT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for DSSSB PGT Chemistry Mock Test - 5 below.
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DSSSB PGT Chemistry Mock Test - 5 - Question 1
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If the 1st of March of a year is a Wednesday, then which of the following months of the same year will start with the same day?

Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 1

Months: Mar, Apr,  May,  June,  July,  Aug,  Sept, Oct
Odd days: 3,  2, 3,  2, 3, 3, 2, 3 
Total 21 odd days 
21/7 = 0
So, November will start with the same day.

DSSSB PGT Chemistry Mock Test - 5 - Question 2
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In a certain coding system, 'PAGES' is coded as 23719 and 'GUEST' is coded as 75196. How will you code 'STAGE' in this coding system?  

Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 2

Each letter has a different code as shown:

So, the code for STAGE will be 96371.

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DSSSB PGT Chemistry Mock Test - 5 - Question 3
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Cardiac muscle is one of the three major types of muscles, the others being skeletal and smooth muscles. It is found in the walls and histological foundation of the heart. Which one of the following statements is not related to the cardiac muscles?

Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 3

Cardiac muscles are striated, uninucleated, and branched. They are involuntary muscles responsible for the rhythmic contraction and relaxation of the heart.

DSSSB PGT Chemistry Mock Test - 5 - Question 4
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Three partners shared the profit in a business in the ratio 5 : 7 : 8. They had partnered for 14 months, 8 months and 7 months respectively. What was the ratio of their investments?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 4

Let their investments be Rs. x for 14 months, Rs. y for 8 months and Rs. z for 7 months respectively.
Then, 14x : 8y : 7z = 5 : 7 : 8.
Now,

DSSSB PGT Chemistry Mock Test - 5 - Question 5
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‘दही’ शब्द है:
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 5

'दही' एक पुल्लिंग शब्द है।
जिन शब्दो से पुरुष जाति का बोध होता है, पुल्लिंग कहलाता है। ग्रहों, देशों, द्रव्य पदार्थो, अनाजो, पर्वतो आदि के नाम पुल्लिंग में आते हैं। जैसे- सूर्य, भारत, लोहा, घी, दही, पीपल, आदि।
अतः सही विकल्प (A) है।

DSSSB PGT Chemistry Mock Test - 5 - Question 6
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नीचे दिए गए पद इक प्रत्यय लगाने से बने है, इनमें से कौन सा पद गलत है?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 6

दैविक, सामाजिक तथा भौैमिक में 'इक' प्रत्यय लगा है।
नए शब्दों की रचना करने के क्रम में कुछ शब्दांशों को शब्दों के पीछे या उनके अंत में जोड़ दिया जाता है। इससे मूलशब्द के अर्थ में बदलाव या विशेषता आ जाती है। ये शब्दांश प्रत्यय कहलाते हैं।
अतः सही विकल्प (D) है।

DSSSB PGT Chemistry Mock Test - 5 - Question 7
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निर्देशः नीचे दिए गए अपठित गद्यांश को ध्यानपूर्वक पढ़ें एवं उस पर आधारित प्रश्न के उत्तर दें।
शिक्षा जीवन के सर्वांगीण विकास हेतु अनिवार्य है। शिक्षा के बिना मनुष्य विवेकशील और शिष्ट नहीं बन सकता। विवेक से मनुष्य में सही और गलत का चयन करने की क्षमता उत्पन्न होती है। विवेक से ही मनुष्य के भीतर उसके चहुँ ओर नित्य प्रति होते घटनाक्रमों के प्रति एक छिद्रान्वेषी दृष्टिकोण उत्पन्न होता है। शिक्षा ही मानव को मानव के प्रति मानवीय भावनाओं से पोषित करती है। शिक्षा से मनुष्य अपने परिवेश के प्रति जाग्रत होकर कर्तव्यविमुख हो जाता है। 'स्व' से 'पर' की ओर अग्रसर होने लगता है। निर्बल की सहायता करना, दुखियों के दु:ख दूर करने का प्रयास करना, दूसरों के दुःख से दु:खी हो जाना और दूसरों के सुख से स्वयं सुख का अनुभव करना जैसी बातें एक शिक्षित मानव में सरलता से देखने को मिल जाती हैं। इतिहास, साहित्य, राजनीतिशास्त्र, समाजशास्त्र, दर्शनशास्त्र इत्यादि पढ़कर विद्यार्थी विद्वान् ही नहीं बनता वरन् उसमें एक विशिष्ट जीवन दृष्टि, रचनात्मकता और परिपक्वता का सृजन भी होता है। शिक्षित सामाजिक परिवेश में व्यक्ति अशिक्षित सामाजिक परिवेश की तुलना में सदैव ही उच्च स्तर पर जीवन यापन करता है।
परन्तु आज शिक्षा का अर्थ बदल रहा है। शिक्षा भौतिक आकांक्षा की साध्य बनती जा रही है। व्यावसायिक शिक्षा के अन्धानुकरण में छात्र सैद्धान्तिक शिक्षा से दूर होते जा रहे हैं। रूस की क्रान्ति, फ्रांस की क्रान्ति, अमेरिकी क्रान्ति, समाजवाद, पूँजीवाद, राजनीतिक व्यवस्था, सांस्कृतिक मूल्यों आदि की सामान्य जानकारी भी व्यावसायिक शिक्षा ग्रहण करने वाले छात्रों को नहीं है। यह शिक्षा का विशुद्ध रोजगारकरण है। शिक्षा के प्रति इस प्रकार का संकुचित दृष्टिकोण अपनाकर विवेकशील नांगरिकों का निर्माण नहीं किया जा सकता। भारत जैसे विकासशील देश में शिक्षा रोजगार का साधन न होकर साध्य हो गई है। इस कुप्रवृत्ति पर अंकुश लगाना अनिवार्य है। जहाँ मानविकी के छात्रों को पत्रकारिता, साहित्य-सृजन, विज्ञापन, जनसम्पर्क इत्यादि कोर्स भी कराए जाने चाहिए ताकि उन्हें रोजगार के लिए न भटकना पड़े, वहीं व्यावसायिक कोर्स करने वाले छात्रों को मानविकी के विषय; जैसे-इतिहास, साहित्य, राजनीतिशास्त्र व दर्शन आदि का थोड़ा बहुत अध्ययन अवश्य कराना चाहिए ताकि समाज को विवेकशील नागरिक प्राप्त होते रहें, तभी समाज में सन्तुलन बना रहेगा।

Q. शिक्षा से मनुष्य स्व' से 'पर' की ओर अभिगमन करने लगता है, क्यों?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 7

प्रस्तुत गद्यांश के अनुसार, “शिक्षा से मनुष्य अपने परिवेश के प्रति जाग्रत होकर कर्तव्यविमुख हो जाता है। 'स्व' से 'पर' की ओर अग्रसर होने लगता है। निर्बल की सहायता करना, दुखियों के दु:ख दूर करने का प्रयास करना, दूसरों के दुःख से दु:खी हो जाना और दूसरों के सुख से स्वयं सुख का अनुभव करना जैसी बातें एक शिक्षित मानव में सरलता से देखने को मिल जाती हैं।”
शिक्षा से मनुष्य स्व' से 'पर' की ओर अभिगमन करने लगता है, क्योंकि उसमें कर्त्वयपरायणता का बोध जागृत होता है।
अतः सही विकल्प (C) है।

DSSSB PGT Chemistry Mock Test - 5 - Question 8
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Giant ionic structures is also name given to
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 8
  • An ionic compound is a giant structure of ions.
  • The ions have a regular, repeating arrangement called an ionic lattice .
  • The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.
DSSSB PGT Chemistry Mock Test - 5 - Question 9
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A substance forms face centered cubic crystals. Its density is 1.984 g/cm3 and the length of the edge of the unit cell is 630 pm. Calculate the molar mass in g/mol?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 9

DSSSB PGT Chemistry Mock Test - 5 - Question 10
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Radii of A+ and that of X- and Y- have been given as 

A+= 1.00 pm

X- = 1.00 pm

Y- = 2.00 pm

Thus, ratio of volumes of A X and A Y unit cells is 
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 10

(a) Ratio of r+ /r_ will decid e the type of unit cell 

For AX    hence, AX has bcc structure.

Thus, octahedral or square planar structure.

DSSSB PGT Chemistry Mock Test - 5 - Question 11
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 Which of the following is an amorphous solid?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 11
  • An amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal.
  • In brief, an amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.
  • Quartz glass (SiO2) is an amorphous solid due to its short range order of constituent particles. Note Quartz is a crystalline solid while quartz glass is an amorphous solid.
DSSSB PGT Chemistry Mock Test - 5 - Question 12
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The potential energy of an electron in the second Bohr's orbit of the he±
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 12

 

DSSSB PGT Chemistry Mock Test - 5 - Question 13
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In Lyman series, shortest wavelength of H-atom appears at x m, then longest wavelength in Balmer series of He+ appear at
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 13

For the spectral line in H -atom and H -like species (one electron)

For Lyman series
For shortest wavelength (maximum wave number) n2 → ∞



For longest wave length (minimum wave number), n2 = (n1, + 1).
For Balmer series, n1 = 2


DSSSB PGT Chemistry Mock Test - 5 - Question 14
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The Brownian motion is due to:
DSSSB PGT Chemistry Mock Test - 5 - Question 15
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Hydrogen is prepared from H2O by adding
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 15

Preparation of Hydrogen from H2O with Ca (Calcium)

  • Hydrogen can be prepared from water (H2O) through a chemical reaction with calcium (Ca).
  • In this reaction, calcium acts as a reducing agent. This is because calcium has the ability to donate electrons during the reaction, which reduces the other reactant, in this case, water.
  • The overall chemical reaction that occurs is: Ca + 2H2O → Ca(OH)2 + H2
  • In this reaction, calcium (Ca) reacts with water (H2O) to form calcium hydroxide (Ca(OH)2) and hydrogen gas (H2).
  • The hydrogen gas that is produced can be collected and used for various purposes.
  • Thus, out of the given options, it is calcium that can act as a reducing agent to prepare hydrogen from water.

Why Other Options are Incorrect

  • Ag (Silver) and Au (Gold) are noble metals and do not readily participate in chemical reactions. They cannot act as reducing agents to produce hydrogen from water.
  • Al (Aluminium) can act as a reducing agent, but it does not react with water under normal conditions to produce hydrogen.

Conclusion

  • Therefore, the correct answer is option B: 'Ca, which acts as reducing agent'.
DSSSB PGT Chemistry Mock Test - 5 - Question 16
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A solution of copper(II) sulphate (VI) is electrolysed between copper electrodes by a currrent of 10.0 A for exactly 9650 s.Which remains unchanged?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 16


0.5 mole of copper is dissolved from the anode. Thus, its mass decreases. 0.5 mole of copper from the anode is deposited at the cathode. Thus, its mass increases.
Thus, molar concentration of aqueous solution of CuSO4 remains unchanged.

DSSSB PGT Chemistry Mock Test - 5 - Question 17
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Covalent nature of NaF, Na2O and Na3N in the increasing order is
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 17

By Fajans' rule,
Smaller the size of cation, larger the size of anion. Larger the charge on cation or anion, larger the polarising power and thus, greater the covalent nature.
NaF, Na2O, Na3N, Na+ is same.


DSSSB PGT Chemistry Mock Test - 5 - Question 18
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Given for HCI and HI 

Q. Ratio of fraction of electric charge existing on each atom in HCI and HI is
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 18



DSSSB PGT Chemistry Mock Test - 5 - Question 19
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Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 19
  • John Newlands arranged the known elements in increasing order of their atomic masses.
  • He started with the element having the lowest atomic mass ( hydrogen) and ended at thorium which was the 56th element.
  • He found that every eighth element had properties similar to the first.
DSSSB PGT Chemistry Mock Test - 5 - Question 20
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The modern periodic table is divided into how many blocks?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 20

The periodic table is divided into four blocks that are called s, p, d, and f. Here is an explanation of each block: The s block makes up the first two columns of the periodic table. The elements in this block are all metals, and they react when water is present.

DSSSB PGT Chemistry Mock Test - 5 - Question 21
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What is the most efficient method to get water with zero degrees hardness?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 21

Permutit is hydrated sodium aluminum silicate, it exchanges it’s sodium ions for divalent ions of calcium and magnesium, permutit when fully exhausted can be regenerated by treating with 10% of sodium chloride solution. It is the most efficient method to get water with zero degrees of hardness.

DSSSB PGT Chemistry Mock Test - 5 - Question 22
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The formula of bleaching powder is:​
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 22

The chemical name of bleaching powder is calcium hypochlorite.it is manufactured by the action of chlorine on slaked lime (Ca(OH).
2Ca(OH)2+ 2Cl2→CaOCl2+ 2H2O+CaCl2

DSSSB PGT Chemistry Mock Test - 5 - Question 23
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Which of the correct statement for the given acids?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 23

Phosphinic acid is a monoprotic acid as it contains one P−OH bond while phosphonic acid is a diprotic acid as it contains two P−OH bonds.

DSSSB PGT Chemistry Mock Test - 5 - Question 24
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Which has lowest bond energy (single bond)?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 24

Presence of lone pairs on bonded atoms generally lowers the bond energy.
Bond energy order is
O—O (146) < (S—S) (266) < S—H(366) < O—H(464) kJ/mol
 

DSSSB PGT Chemistry Mock Test - 5 - Question 25
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Which of the following statement is incorrect ?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 25

The correct order of bond dissociation enthalpy is

DSSSB PGT Chemistry Mock Test - 5 - Question 26
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Comprehension Type

Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data etc. Two questions related to the paragraph have been given. Each has only one correct answer among the four given options (a) ,(b), (c) and (d).

Passage

Consider the following isomers of [Co(NH3)4Br2]+. The black sphere represents Co, grey sphere represents NH3 and unshaded sphere represents Br.

Q.

The oxidation state and coordination number of cobalt in the complex [Co(NH3)4Br2]+ are
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 26

For O.S:

X + 0 + 2(-1) = 1

X = 3

Coordination number is the number of molecules linked to the central atom.

Hence B is the correct answer.

DSSSB PGT Chemistry Mock Test - 5 - Question 27
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Identify the pair of enantiomers amongst the given pairs:
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 27

The correct answer is Option B.
The 1st option has R configuration and 2nd has S configuration hence they are non super imposable mirror images of each other and are enantiomers.

DSSSB PGT Chemistry Mock Test - 5 - Question 28
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The reaction of SOCI2 on alkanols to form alkyl chlorides gives good yields because
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 28


The gaseous byproducts escape out on its own continuously driving the reaction in forward direction.

DSSSB PGT Chemistry Mock Test - 5 - Question 29
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What is the major product of the given reaction ?
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 29

α-carbon is achiral, hence retention of configuration at β-carbon.

DSSSB PGT Chemistry Mock Test - 5 - Question 30
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Chloramphenicol is used to treat typhoid, dysentery, acute fever, meningitis etc., because it is
Detailed Solution for DSSSB PGT Chemistry Mock Test - 5 - Question 30

Chloramphenicol treats typhoid, dysentery, acute fever, meningitis etc.,as it is Bacteriostatic and broad spectrum antibiotic.

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