Q:

The mass of one molecule of oxygen is

A) 2.3 x 10-23 g	B) 3.3 x 10-23 g
C) 4.3 x 10-23 g	D) 5.3 x 10-23 g

Answer & Explanation Answer: D) 5.3 x 10-23 g

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Q:

Panchayatiraj form of rural government was first adopted by

A) Rajasthan & Madhya Pradesh	B) Rajasthan & West Bengal
C) Rajasthan & Andhra Pradesh	D) Rajasthan & Uttar Pradesh

Answer & Explanation Answer: C) Rajasthan & Andhra Pradesh

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Q:

In which of the following animals is respiration done by skin?

A) Flying fish	B) Sea horse
C) Frog	D) Chemeleon

Answer & Explanation Answer: C) Frog

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Q:

Rearrange the parts of the sentence in correct order.

Despite this high-level political

P-have achieved little
Q-these summits
R-attention, and fanfare,

A) QRP	B) RQP
C) PRQ	D) PQR

Answer & Explanation Answer: B) RQP

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Q:

Improve the bracketed part of the sentence.

When I last saw Ravi, he (had been running) to catch his bus.

A) ran	B) was running
C) had run	D) no improvement

Answer & Explanation Answer: B) was running

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Q:

Select the antonym of

to placate

A) to provoke	B) to propitiate
C) to tranquilize	D) to mollify

Answer & Explanation Answer: A) to provoke

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Q:

What enables an electric current to flow in a circuit?

A) The motion of electrons	B) The motion of neutrons
C) The motion of positrons	D) The motion of protons

Answer & Explanation Answer: A) The motion of electrons

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Q:

Is B2+ Paramagnetic or Diamagnetic?

Answer

B2+ is a Paramagnetic.

The filled orbitals are $σ$ (1s) $^{2}$ , $σ^{*}$ (1s) $^{2}$ , $σ$ (2s) $^{2}$ , $σ^{*}$ (2s) $^{2}$ . The half-filled orbitals are $π$ (2p $_{x}$ ) and $π$ (2p $_{y}$ ). Since it posses 2 unpaired electrons, it is Paramagnetic in nature.

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