NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 113 - 117 of 1258

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Question number: 113

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

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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 occur together in nature in beryl

b.

BeO and Al 2O 3 are amphoteric

c.

Be 2 C and Al 4C 3 are methanides

d.

Beryllium and aluminium have same maximum covalency

Question number: 114

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

Because of + 2 oxidation state.

b.

hydration energies of alkaline earth metals are higher

c.

alkaline earth metals are more electropositive

d.

lower hydration energies of alkaline earth metals

Question number: 115

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

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MCQ▾

Question

Which of the following has the tendency to form covalent compounds?

Choices

Choice (4) Response

a.

Magnesium

b.

Beryllium

c.

Calcium

d.

Strontium

Question number: 116

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

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MCQ▾

Question

Li has following abnormal behavior in its group?

Choices

Choice (4) Response

a.

is covalent in nature

b.

Lithium carbonate decomposes into its oxide on heating unlike other metals

c.

is poor conductor of electricity in molten state

d.

is stable compound

Question number: 117

» S-Block Elements Group 1 and 2 » Industrial Uses » Cement

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MCQ▾

Question

What is composition of Duralumin?

Choices

Choice (4) Response

a.

5 % Al + 0.5 % Mg + 0.5 % Mn + 94 % Cu

b.

90 % Al + 0.5 % Mg + 0.5 % Mn + 4% Cu

c.

95 % Al + 0.5 % Mg + 0.5 % Mn + 4% Cu

d.

65 % Al + 0.5 % Mg + 25 % Mn + 4.5 % Cu