Q:

Which pair of atoms has the highest electronegativity difference?

(Calcium's electronegativity is 1.0

Fluorine's electronegativity is 4.0

Hydrogen's electronegativity is 2.2

Sodium's electronegativity is 0.93)

A) F-F	B) Ca-F
C) H-F	D) Na-F

Answer & Explanation Answer: D) Na-F

Explanation:

F-F = 4 - 4 = 0

Ca-F = 4 - 1 = 3.0

H-F = 4 - 2.2 = 1.8

Na-F = 4 - 0.93 = 3.07

Hence, the highest electronegativity difference is in Na-F.

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Q:

Read each sentence to find out whether there is any error in any part

He was courted arrest(a) in order to protest against(b) corruption among the government servants(c). No error.(d)

A) a	B) b
C) c	D) d

Answer & Explanation Answer: A) a

Explanation:

The phrase ‘was courted’ needs to be replaced with ‘courted’ to make the sentence grammatically and contextually correct. Thus, the correct sentence would be, ‘He courted arrest in order to protest against corruption among the government servants’.

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Q:

Select the antonym of

cameo

A) trinket	B) gem
C) bauble	D) plain

Answer & Explanation Answer: D) plain

Explanation:

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Q:

Boron cannot form which one of the following anions?

(1) $B O_{2}^{-}$

(2) $B F_{6}^{3 -}$

(3) $B H_{4}^{-}$

(4) $B (O H)_{4}^{-}$

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: B) Option 2

Explanation:

Due to absence of low lying vacant d orbital in B, $s p^{3} d^{2}$ hybridization is not possible hence $B F_{6}^{3 -}$ will not formed.

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Q:

The wind is variable today.

Synonym of the word in bold?

A) mild	B) Shifting
C) Steady	D) Chilling

Answer & Explanation Answer: B) Shifting

Explanation:

Variable means changes or shifts timely. Hence, synonym of variable is shifting.

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Q:

Which are the special proteins in muscles that contract and relax to cause movement?

A) Contractile protein	B) Receptor protein
C) Structural protein	D) Enzymatic protein

Answer & Explanation Answer: A) Contractile protein

Explanation:

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Q:

Select the antonym of

void

A) destitute	B) scant
C) bereft	D) adequate

Answer & Explanation Answer: D) adequate

Explanation:

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Q:

What is the standard room temperature in Kelvin?

A) 98 K	B) 198 K
C) 273 K	D) 373 K

Answer & Explanation Answer: A) 98 K

Explanation:

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