Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 69 - 74 of 144

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Question number: 69

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Which of the following statements about the modern periodic table is true?

Choices

Choice (4) Response

a.

It has 18 vertical columns called periods

b.

It has 7 vertical columns called periods

c.

It has 7 horizontal rows called groups

d.

It has 18 horizontal rows called periods

Question number: 70

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Ankit while heating solid lead nitrate taken in a test-tube, observed

Choices

Choice (4) Response

a.

brown residue of Equation

b.

green residue of Equation

c.

yellow residue of Equation

d.

white residue to Equation

Question number: 71

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Arrange the following elements in increasing order of their ionization energies

Nb, Sr, Y, Cd, Rb

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 72

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Which of the following pairs includes isomeric compounds?

Choices

Choice (4) Response

a.

Aldehydes and carboxylic acids

b.

Alcohols and aldehydes

c.

Alcohols and ketones

d.

Ketones and aldehydes

Question number: 73

» Chemistry » Carbon and Its Compounds

Appeared in Year: 2013

MCQ▾

Question

The type of radiation absorbed by Equation molecule in atmosphere are

Choices

Choice (4) Response

a.

X-rays

b.

UV-rays

c.

Infra-red rays

d.

Gamma rays

Question number: 74

» Chemistry » Structure of Atom

MCQ▾

Question

Which of the following will have equal number of electrons?

Choices

Choice (4) Response

a.

Cl and Br

b.

Ar and Ne

c.

Na + and Mg 2+

d.

Mg 2+ and Ca 2+

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