Q:

Simpson and Harrison are associated with the invention of

A) Boson	B) Chloroform
C) Balloon	D) None of these

Answer & Explanation Answer: B) Chloroform

Explanation:

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Filed Under: Inventions

14 9347

Q:

Who introduced gold coins for the first time in India?

A) Kushanas	B) Guptas
C) Mauryas	D) Sakas

Answer & Explanation Answer: A) Kushanas

Explanation:

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Filed Under: Indian History
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15 9336

Q:

India won its first Olympic hockey gold in

A) 1928	B) 1932
C) 1936	D) 1948

Answer & Explanation Answer: A) 1928

Explanation:

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Filed Under: Sports

33 9335

Q:

What comes once in a year, twice in a week and never in a day?

A) Sunday	B) New moon day
C) E	D) All of the above

Answer & Explanation Answer: C) E

Explanation:

YEAR - 1 E

WEEK - 2 E

DAY - 0 E

Hence, the letter 'E', comes once in a year, twice in a week and never in a day.

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Filed Under: Logic Puzzles
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9 9330

Q:

Isotopes have ______.

I. similar physical quantities and different chemical properties

II. different physical properties

III. similar chemical properties

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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Filed Under: Chemistry
Exam Prep: Bank Exams

2 9314

Q:

A universal recipient belongs to the blood group

A) AB	B) O
C) B	D) A

Answer & Explanation Answer: A) AB

Explanation:

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Filed Under: General Awareness

44 9308

Q:

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :

A) 518 nm	B) 1035 nm
C) 325 nm	D) 743 nm

Answer & Explanation Answer: D) 743 nm

Explanation:

$\frac{1}{λ} = \frac{1}{λ 1} + \frac{1}{λ 2}$

$\frac{1}{355} = \frac{1}{680} + \frac{1}{λ 2}$

$\frac{1}{λ 2} = \frac{680 - 355}{680 \times 355}$

$\Rightarrow λ 2 = 743 n m$ .

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Filed Under: Chemistry
Exam Prep: AIEEE

12 9307

Q:

What holds the sides of the DNA ladder together?

A) Polar covalent bonds	B) Ionic bonds
C) Metallic bonds	D) Covalent bonds

Answer & Explanation Answer: D) Covalent bonds

Explanation:

Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA i.e, A sugar (deoxyribose) and a phosphate.

DNA is a double-stranded molecule twisted into a helix (think of a spiral staircase). Each spiraling strand, comprised of a sugar-phosphate backbone and attached bases, is connected to a complementary strand by non-covalent hydrogen bonding between paired bases. The bases are adenine (A), thymine (T), cytosine (C) and guanine (G). A and T are connected by two hydrogen bonds. G and C are connected by three hydrogen bonds.

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Filed Under: Biology
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16 9299

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