Q. 21 Which one of the following is not a mixture

Q: Hydrogen bomb is based on the principle of

The Correct Answer is nuclear fusion

Q: Which of the following is NOT a property of bases?

The Correct Answer is They turn blue litmus red

A) mercury

B) air

C) cement

D) milk

✔ mercury

View Explanation

Q. 22 Silver Mirror test is given by which one of the following compounds?1. Benzophenone2. Acetaldehyde3. Acetone4. Formaldehyde

A) Only 2

B) Only 1

C) 2 and 4

D) 1 and 3

✔ 2 and 4

View Explanation

Q. 23 Which of the following is a non metal that remains liquid at room temperature ?

A) Phosphorous

B) Chlorine

C) Helium

D) Bromine

✔ Bromine

View Explanation

Q. 24 The maximum number of electrons that can be accommodated in a shell depends on the formula

A) n2

B) 1n2

C) 2n2

D) 3n2

✔ 2n2

View Explanation

Q. 25 Boron cannot form which one of the following anions?(1) BO2-(2) BF63-(3) BH4-(4) B(OH)4-

A) Option 2

B) Option 1

C) Option 4

D) Option 3

✔ Option 2

View Explanation

Q. 26 Hydrogen bomb is based on the principle of

A) nuclear fusion

B) nuclear fission

C) artificial radioactivity

D) natural radioactivity

✔ nuclear fusion

View Explanation

Q. 27 Among the following the maximum covalent character is shown by the compound(1)MgCl2(2)FeCl2(3)SnCl2(4) AlCl3

A) Option 2

B) Option 1

C) Option 4

D) Option 3

✔ Option 4

View Explanation

Q. 28 Which of the following is NOT a property of bases?

A) They turn red litmus blue

B) They react with acids and neutralise them

C) They have bitter taste

D) They turn blue litmus red

✔ They turn blue litmus red

View Explanation

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