Hydrogen bonds and hydrophilic interactions are

Q:

The percentage of nitrogen in the air is about

A) 74%	B) 76%
C) 78%	D) 80%

Answer & Explanation Answer: C) 78%

Explanation:

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9 885

Q:

Methane contributes towards global warming so it is called a _________________ gas.

A) poisonous	B) carcinogenic
C) infectious	D) greenhouse

Answer & Explanation Answer: D) greenhouse

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Q:

Which of the following is a metal?

A) Sulphur	B) Nitrogen
C) Oxygen	D) No option is correct

Answer & Explanation Answer: D) No option is correct

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1 10402

Q:

Which of the following group is NOT Dobereiner Triads?

A) Li, Na, K	B) N, P Au
C) Cl, Br, I	D) Ca, Sr, Ba

Answer & Explanation Answer: B) N, P Au

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Q:

Safety matches contain

A) Sulphur	B) Phosphorus
C) Magnesium	D) Potassium

Answer & Explanation Answer: B) Phosphorus

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3 853

Q:

Air ___________________ are the substances which contaminate the air.

A) Reactants	B) Irritants
C) Resistants	D) Pollutants

Answer & Explanation Answer: D) Pollutants

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2 813

Q:

By using which foam the Researchers from Indian Institute of Technology – Bombay have made a low cost piezo resistive vibration sensor?

A) Only Polyurethane	B) Only Polyethylene
C) Both Polyurethane and Polyethylene	D) Neither Poly urethane nor Polyethylene

Answer & Explanation Answer: B) Only Polyethylene

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5 872

Q:

Which of the following is NOT a compound?

A) Ammonia	B) Milk
C) Sodiumchloride	D) Chalk

A) Strong chemical bonds that hold together the atoms within a molecule	B) Weak chemical bonds that hold together the atoms within a molecule
C) Strong chemical bonds that link together separate molecules	D) Weak chemical bonds that link together separate molecules

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