Q:

Rust forms when _____ reacts with chemicals in rocks.

A) Water	B) Oxygen
C) Nitrogen	D) Carbondioxide

Answer & Explanation Answer: B) Oxygen

Explanation:

Rust forms when oxygen reacts with chemicals in rocks, and that is often the case with many other elements in general. Like a copper nail being exposed to the air will rust.

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1 3121

Q:

According to the 2011 census, the Indian State that has the dubious distinction of having the worst male-female ratio was ______.

A) Kerala	B) Uttar Pradesh
C) Delhi	D) Haryana

Answer & Explanation Answer: D) Haryana

Explanation:

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Q:

If the speed of an object moving along a straight line keeps changing, its motion is said to be _________.

A) Uniform	B) Periodic
C) Circular	D) Non-uniform

Answer & Explanation Answer: D) Non-uniform

Explanation:

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Q:

Which one of the following years is known as the 'Year of the Great Divide' with regard to population, after which there has been a continuous and rapid growth in India's population?

A) 1911	B) 1921
C) 1941	D) 1951

Answer & Explanation Answer: B) 1921

Explanation:

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2 3119

Q:

Which state government has launched poshan Abhiyan, to eradicate malnutrition?

A) Gujarat	B) Maharashtra
C) Mizoram	D) Tripura

Answer & Explanation Answer: A) Gujarat

Explanation:

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0 3118

Q:

When a running car stops suddenly, the passengers tends to lean forward because of

A) Gravitational force	B) Inertia of motion
C) Law of conservation of mass	D) Both B & C

Answer & Explanation Answer: B) Inertia of motion

Explanation:

When a running car stops suddenly, the passengers tends to lean forward because of Inertia of motion.

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Q:

When a piece of pure silicon is doped with aluminium, then

A) the conductivity of the doped silicon piece will remain the same	B) the doped silicon piece will become n-type
C) the doped silicon piece will become p-type	D) the resistivity of the doped silicon piece will increase

Answer & Explanation Answer: C) the doped silicon piece will become p-type

Explanation:

p type of semiconductor is obtained when Silicon is doped with a trivalent impurity like Aluminium. Aluminium is a p-type dopant, which means that when a semiconductor i.e. silicon is doped with aluminium, it creates a hole (positively charged carrier) by accepting an electron from the silicon atom. Electrical conductivity of semiconductors increasesand resistivity remains the same

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Q:

Which of the following is a programme under which electric connection is given to people below poverty line

A) MPLADS	B) Kutir Jyoti
C) Ganga Kalyan Yojana	D) Sangam Yojana

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