S-Block Elements Group 1 and 2 (NEET Chemistry): Questions 7 - 11 of 49

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Question number: 7

» S-Block Elements Group 1 and 2 » Industrial Uses » Plaster of Paris

MCQ▾

Question

Addition of alum to plaster of Paris makes the setting very hard. The mixture is known as?

Choices

Choice (4) Response
a.

Dead plaster

b.

Chalk

c.

Burnt plaster

d.

Keene cement

Question number: 8

» S-Block Elements Group 1 and 2 » Trends in Physical and Chemical Properties

MCQ▾

Question

Which pair of following chloride do not impart colour to the flame?

Choices

Choice (4) Response
a.

CaCl2,MgCl2

b.

CaCl2,BaCl2

c.

SrCl2,BaCl2

d.

MgCl2,BeCl2

Question number: 9

» S-Block Elements Group 1 and 2 » Trends in Physical and Chemical Properties

MCQ▾

Question

A metal M readily forms water soluble sulphate MSO4, water insoluble hydroxide M(OH)2 and oxide MO which becomes inert on heating. The hydroxide is soluble in NaOH. Then M is?

Choices

Choice (4) Response
a.

Magnesium

b.

Strontium

c.

Beryllium

d.

Calcium

Question number: 10

» S-Block Elements Group 1 and 2 » Anomalous Properties of the First Element of Each Group

MCQ▾

Question

Beryllium show diagonal relationship with aluminium. Which one of the following properties

is not shown by both?

Choices

Choice (4) Response
a.

Beryllium and aluminium have same maximum covalency

b.

BeO and Al 2O 3 are amphoteric

c.

Be 2 C and Al 4C 3 are methanides

d.

Beryllium and aluminium occur together in nature in beryl

Question number: 11

» 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

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