S-Block Elements Group 1 and 2-Preparation and Properties (NEET Chemistry): Questions 1 - 6 of 9

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Question number: 1

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Hydroxide

MCQ▾

Question

In the following reaction, 6NaOH+4SA+2Na2S+3H2O , What is A?

Choices

Choice (4) Response

a.

Na2S

b.

Na2SO3

c.

Na2S2O3

d.

Na2SO4

Question number: 2

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Hydroxide

MCQ▾

Question

Which of the following sodium compound will give phosphine gas when reacted with yellow phosphorus?

Choices

Choice (4) Response

a.

NaOH

b.

Na2S

c.

NaCl

d.

Na2CO3

Question number: 3

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Carbonate

MCQ▾

Question

Magnesium chloride exists as MgCl 2. 6H 2 O, but sodium chloride exists as NaCl . Why?

Choices

Choice (4) Response

a.

hydration energies of alkaline earth metals are higher

b.

Because of + 2 oxidation state.

c.

alkaline earth metals are more electropositive

d.

lower hydration energies of alkaline earth metals

Question number: 4

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Hydroxide

MCQ▾

Question

Write down the increasing order of melting points of alkali metals?

Choices

Choice (4) Response

a.

Rb<Cs<Na<K

b.

Cs<Rb<K<Na

c.

K<Rb<Na<Li

d.

K<Li<Rb<Na

Question number: 5

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Hydroxide

MCQ▾

Question

What will the product when dry ammonia is passed over sodium at 400 0 C in absence of air?

Choices

Choice (4) Response

a.

NaH+NH3

b.

NaOH+NH3

c.

NaNH2

d.

NaH

Question number: 6

» S-Block Elements Group 1 and 2 » Preparation and Properties » Sodium Hydroxide

MCQ▾

Question

Which of the following is true about sodium?

Choices

Choice (4) Response

a.

NaOH solution does not react with chlorine.

b.

Manganous hydroxide is soluble in excess of NaOH solution.

c.

NaOH is primary standard in volumetric analysis

d.

NaOH is used in concentration of bauxite ore

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