Q:

If V/I is a constant, it is called:

A) Potential difference	B) Current
C) Coulomb	D) Resistance

Answer & Explanation Answer: D) Resistance

Explanation:

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Q:

In Angiosperms, plant embryos in seed have structures called ______.

A) Spore	B) Buds
C) Sprout	D) Cotyledon

Answer & Explanation Answer: D) Cotyledon

Explanation:

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Q:

Which one of the following statements would be INCORRECT to use?

A) An atom of a compound	B) A mole of an element
C) A mole of a compound	D) An atom of an element

Answer & Explanation Answer: A) An atom of a compound

Explanation:

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Q:

Generally covalently bonded molecules ______.

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

A) Only I and II	B) Only I and III
C) Only II and III	D) All I, II and III

Answer & Explanation Answer: C) Only II and III

Explanation:

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Q:

Statement I :

A person may suffer from tuberculosis if she/he frequently visits crowded place.

Statement II :

Bacteria of tuberculosis spread through droplets by sneezing or coughing.

A) Both the statements are individually true and Statement II is the correct explanation of Statement I	B) Both the statements are individually true but Statement II is not the correct explanation of Statement I
C) Statement I is true but Statement II is false	D) Statement I is false but Statement II is true

Answer & Explanation Answer: D) Statement I is false but Statement II is true

Explanation:

Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis.

It's spread when a person with active TB disease in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain TB bacteria.

One would have to spend prolonged periods (several hours) in close contact with an infected person to catch the infection yourself.For example, TB infections usually spread between family members who live in the same house. It would be highly unlikely for you to become infected by sitting next to an infected person on a bus or train. Hence, statement 1 is incorrect.

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Q:

According to ohm's law, which of the following is true?

A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends	B) The current flowing through a wire is directly proportional to its resistance
C) The current flowing through a wire is indirectly proportional to its length	D) The current flowing through the wire is indirectly proportional to the Potential Difference applied across its ends

Answer & Explanation Answer: A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends

Explanation:

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Q:

The source of energy of the sun is

A) Nuclear fusion	B) Photoelectric effect
C) Nuclear fission	D) Chemical reaction

Answer & Explanation Answer: A) Nuclear fusion

Explanation:

The transformation of Hydrogen atoms into Helium atoms with an emission of vast amount of energy is called nuclear fusion which is the source of energy for the Sun.

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Q:

Primary growth in plants occurs by

A. Vertical meristem

B. Lateral meristem

C. Intercalary meristem

D. Apical meristem

A) C & D	B) A, B & D
C) A, B, C & D	D) B, C & D

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