Which of the following ionization techniques involves the production of ions by spraying a solution of the analyte into an electric field?

A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?

A

Only C and D

B

Only A and B

C

Only A, C and D

D

Only A, B and D

E

Only A, B and C

A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl. Assume adding salt doesn’t change its volume and find the ratio of x and y.

A

1

B

1.25

C

1.5

D

2

E

1.75

Electrospray ionization MS and matrix-assisted laser desorption ionization (MALDI) MS only differ in the ionization procedure used.

A

True

B

False

The gradient separates the analyte mixture as a function of affinity of the analyte for the mobile phase relative to stationary phase.

A

True

B

False

Which of the following statements is/are true/false? A. An acid which is completely ionized into ions and produces a large number of H+ ions. For example HCl, H2 SO4, HNO3 B. An acid which is partially ionized in water and produces less number of H+ ions. For example CH3COOH, H2CO3, H2SO2

A

Both A and B are true

B

Only B is true

C

Both A and B are false

D

Only A is true

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): In Gunn effect, when electric field is varied from zero to a threshold value the drift velocity decreases. Reason (R): Beyond the threshold electric field, if the electric field is increased, the drift velocity is decreased and the diode exhibits negative resistance. In the light of the above statement, choose the most appropriate answer from the options given below:

A

Both (A) and (R) are correct and (R) is the correct explanation of (A)

B

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

C

(A) is correct but (R) is not correct

D

(A) is not correct but (R) is correct

Consider the following statement: 1. X-ray beam can be deflected by a magnetic field. 2. X-ray beam can be deflected by a electric field. 3. X-ray can neither be deflected by an electric field nor by a magnetic field. Which of the following statement is correct?

A

Only 1

B

Only 2

C

Only 3

D

Both 1 and 3

Which of the following ionization technique was able to overcome the propensity of the analyte fragmentation?

A

Electron ionization

B

FAB

C

Chemical ionization

D

ESI

A force \(\vec F\), acting on a electric charge q, in presence of electro-magnetic field, moves the charge parallel to the magnetic field with velocity \(\vec v\). Then \(\vec F\) is equal to (where \(\vec E\)and \(\vec B\) are electric field and magnetic field respectively)

A

\(q\vec E\)

B

\(q\left( {\vec v \times \vec B} \right)\)

C

\(q\left( {\vec v \times \vec E} \right)\)

D

\(q\vec B\)

There are five crude oil refining companies in India namely, A, B, C, D, and E. Statements: I. The production of Company B is more than that of Company A but not more than that of Company E. II The production of Company C is more than the production of Company B but NOT as much as that of Company D. III. The production of E is NOT as much as the production of Company D. Which of these statements is/are sufficient to answer the question that the production of which of the following companies is the highest?

A

Statement (I) and Statement (II) together are sufficient

B

Either statement (I) and statement (II) together or statement (III) are statement

C

Any two statements together are sufficient

D

All the statement (I), statement (II) and statement (III) together are sufficient

Which of the following ionization techniques involves the production of ions by spraying a solution of the analyte into an electric field?

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