Questions

Q:

Which of the following is the most abundant metal on Earth's crust?

A) Magnesium B) Iron
C) Copper D) Aluminium
 
Answer & Explanation Answer: D) Aluminium

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Q:

Rayon is obtained from which among thefollowing?

A) Silk B) Wood pulp  
C) Wool   D) Cotton
 
Answer & Explanation Answer: B) Wood pulp  

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Q:

Which of the following are the smaller planets than the size of the Earth?

A) Uranus and Mars B) Neptune and Venus
C) Venus and Mars D) Neptune and Mars
 
Answer & Explanation Answer: C) Venus and Mars

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Q:

The Ozone layer is present in which atmospheric layer?

A) Lithosphere B) Ionosphere
C) Stratosphere D) Biosphere
 
Answer & Explanation Answer: C) Stratosphere

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Q:

Which among the following is not a characteristic of oxidation reaction?

A) It involves addition of hydrogen B) It involves addition of oxygen
C) It involves loss of electrons D) 4) It involves addition of electronegative element
 
Answer & Explanation Answer: A) It involves addition of hydrogen

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Q:

The amount of BaSO4 formed on mixing an aqueous solution of 2.08 gm of BaCl2 and excess of dilute H2SO4 is ___.

(atomic weights : Ba = 137, Cl = 35.5, S = 32, O = 16)

A) 2.33 g B) 2.08 g
C) 23.3 g D) 1.04 g
 
Answer & Explanation Answer: A) 2.33 g

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Q:

_________________ is a drug that makes your heart work more slowly, used for treating high blood pressure.

A) Contraceptive B) Beta­-Blocker
C) Depressant D) Enema
 
Answer & Explanation Answer: B) Beta­-Blocker

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Q:

Gaseous exchange takes place in leaves through tiny pores for the purpose of photosynthesis. What are these pores?

A) Chloroplast B) Stomata
C) Chlorophyl D) Vacuole
 
Answer & Explanation Answer: B) Stomata

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