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 9303

Q:

Select the synonym of

aground

A) stranded	B) higher
C) afloat	D) buoyant

Answer & Explanation Answer: A) stranded

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

1 9298

Q:

Select the antonym of

to wring

A) to gouge	B) to untwist
C) to extort	D) to choke

Answer & Explanation Answer: B) to untwist

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 9295

Q:

Mr.Meera Sahib Fathima Beevi is distinguished as the first lady

A) Judge of the High Court	B) Governor of a State
C) Judge of the Supreme Court	D) Gold medal winner in Sports

Answer & Explanation Answer: C) Judge of the Supreme Court

Explanation:

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Filed Under: Famous Personalities

18 9295

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
Exam Prep: AIEEE , Bank Exams , GATE
Job Role: Analyst , Bank Clerk , Bank PO

16 9294

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
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
Job Role: Analyst , Bank Clerk , Bank PO

9 9292

Q:

Improve the bracketed part of the sentence.

If the screen (was any brighter), it would have been easier to read from the tablet.

A) was bright enough	B) was more brighter
C) had been brighter	D) no improvement

Answer & Explanation Answer: C) had been brighter

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 9290

Q:

Mithir Sen is associated with

A) Hockey	B) Swimming
C) Volley ball	D) Weighlifting

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