Bihar PGT Chemistry Mock Test - 9 - Bihar PGT/TGT/PRT MCQ

A realist is a person who analyses every problem on real and factual terms.
Example- The world today requires realist leaders more than anything else.

चाँदनी के पर्यायवाची शब्द है - चन्द्रिका, कौमुदी, ज्योत्स्ना, चन्द्रमरीचि, उजियारी, चन्द्रप्रभा, जुन्हाई आदि।

मयंक, चांद का पर्यायवाची है।

देश शब्द पुल्लिंग है। पर्वतो तथा दिनो के नाम पुल्लिंग होते हैं इसलिए सोमवार और हिमालय भी पुल्लिंग होगा।

विकल्पो में दिए गए रचनाकार - रचना के सभी युग्म सही सुमेलित हैं।

हिन्दी को 14 सितम्बर, 1949 को भारतीय संविधान में मान्यता मिली थी। 14 सितंबर 1949 को संविधान सभा में हिंदी को राजभाषा का दर्जा दिया गया था। हिंदी के महत्व को बताने और इसके प्रचार प्रसार के लिए राष्ट्रभाषा प्रचार समिति के अनुरोध पर 1953 से प्रतिवर्ष 14 सितंबर को हिंदी दिवस के तौर पर मनाया जाता है।

प्रकाशन वर्ष की दृष्टी से काव्यकृतियों का सही अनुक्रम-3 आँसू, पल्लव, स्वप्न, साकेत है। 

आँसू- 1925 ई. में जयशंकर प्रसाद द्वारा रचित काव्य है। पल्लव सुमित्रानंदन पन्त का तीसरा कविता संग्रह है जो 1928 में प्रकाशित हुआ था। स्वप्न 1929 में रामनरेश त्रिपाठी द्वारा रचित काव्य है। साकेत मैथिलिशरण गुप्त द्वारा रचित महाकाव्य का नाम है। इसका प्रथम प्रकाशन सन् 1931 में हुआ था। 

The logic followed is:

Abduct and Kidnap are synonyms.

Similarly,

Fierce and Violent are synonyms.

Hence, the correct answer is "Violent".

The word that can be prefixed to make the following new words is ‘Mis’.

Mis + Interpret = Misinterpret

Mis + Behave = Misbehave

Mis + Understand = Misunderstand

Mis + Take = Mistake

The correct answer is Orbit.

• An orbit is the path of a planet around the sun.

Key Points

• Kepler's Law of Planetary Motion states that planets revolve in an elliptical orbit.
• Kepler’s Laws of Planetary Motion:
  • All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.
  • The position vector of the planet with the sun at the origin sweeps out equal area in equal time.
  • The square of the period of revolution of a planet around the sun is directly proportional to the cube of the main distance of the planet from the sun.

Additional Information

• Our galaxy is called the Milky Way (or the Akashganga) and it contains about 300 billion stars and one of these is our sun.
  • Planets and other objects go round the sun and make up the solar system with the sun at the center. 
  • Milky Way Galaxy was formed 5 billion years after the Big Bang.

Given:

x + y + 1 = 0

Concept Used:

(a + b )³ = a³ + b³ + 3ab (a + b)

Calculations:

x + y + 1 = 0

⇒ x + y = -1

Cubing on both sides we get

(x + y)³ = ( -1 )³

⇒ x³ + y³ + 3xy( x + y ) = -1

⇒ x³ + y³ + 3xy ( -1) = -1

∵ x + y = -1

⇒ x³ + y³ - 3xy = -1

∴ required value = -1

The correct answer is 1950-51.

Key Points

• Economic Survey is a report of the government on the state of the economy of the country during the last one year.
• It is prepared by the Department of Economic Affairs, under the Ministry of Finance.
• Chief Economic Advisor releases the Economic Survey.
• At first, it was released along with the Union Budget but later it was separated from the budget in 1964 to give a better understanding of the budget proposals.
• It is released one day before the Union Budget.
• Now it is presented in 2 volumes.
• It has no constitutional backing. Its findings and suggestions are not binding on the government.
• First Chief Economic Advisor to the government was Mr. J.J. Anjaria.
• The current Chief Economic Advisor is Dr. V. Anantha Nageswaran.

The correct answer is the Helium nucleus.

• Helium nucleus was the source of alpha particles in the Rutherford scattering experiment.
• Ernest Rutherford, a British scientist conducted an experiment and proposed the atomic structure of elements.

Key Points

• Rutherford conducted an experiment by bombarding a thin sheet of gold with α-particles.
• He then analysed the trajectory of these particles after their interaction with the gold foil.
• Since very few α-particles were deflected back, and only a few α-particles had nearly 180^o angle of deflection.
• Hence he concluded that the volume occupied by the positively charged particles in an atom is very small as compared to the total volume of an atom.

Venn diagram according to the given information is:

Guava, Mangoes, Fruits

As Mangoes and guava both are fruits, so they will come inside the fruits.

But,

Individually both the guava and mangoes are different fruits so there will be no intersection or shared part, so they will come as a separate circle inside the fruits.

Hence, the correct answer is "Option 4".

Vicinal diols which is not tertiary, prefer to form dioxane while tertiary diols prefer to undergo Pinacol-pinacolone rearrangement.

The diol is not tertiary, hence more likely to form dioxane.

PCI₅
sp³d-hybrid orbitals—No non-bonding pair trigonal bipyramidal structure.

IF₅ sp³d²-hybrid orbitals—One non-bonding pair; one F and non-bonding pair lie in different sides so as to minimise repulsion. Square pyramidal.

The main chemicals in air pollution that create acid rain are sulfur dioxide (SO2) and nitrogen (NO2). Acid rain usually forms high in the clouds where sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants. this mixture forms a mild solution of sulfuric acid and nitric acid.

Adsorption and absorption is commonly known as sorption.

Formal charge (F)

where, v = valence electrons = 6
s = shared electrons = 4
u = unshared electron = 4

Sorret established formula of ozone.

The oxidation state of superoxide is -1/2 . and there is two superoxide so oxidation state of Rb is +1.

Thermite process doesn’t require a catalyst.

MO configuration of O₂⁺ (8+8-1=15)


 

Metal activity series or electrochemical series is a series in the decreasing order of metals which are active during a chemical reaction comparatively with each other.

• Here, Zinc’s activity is greater than Copper’s activity and Copper’s activity is greater than that of silver.

The correct answer is Option B.

Rate =k[A]ⁿ[B]^m
          
When 
A'= 2A and
B'= 0.5B
 
The new rate becomes Rate' 
=[2A]ⁿ[0.5]^m

EC of Cr (24) is

Fehling's solution to make difference between carbohydrate and ketone functional grp and also used for differentiate reducing and non reducing sugar and as u know glucose is a reducing sugar so it will give red colour with fehling's solution (all monosachharides are reducing sugar).