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(a) Write four negative integers greater than \(−{20}\). (b) Write four negative integers less than\(−{10}\).

(a) \(-{19},-{18},-{17},-{16}\)

(b) \(-{11},-{12},-{13},-{14}\)

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(b) \(-{11},-{12},-{13},-{14}\)

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A shopkeeper purchased 200 bulbs for Rs 10 each. However 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs 12 each. Find the gain or loss %.

Which of the following are Lewis acids?

(A) \({B}{C}{l}_{{{3}}}\) and \({A}{I}{C}{l}_{{{3}}}\)

(B) \({P}{H}_{{{3}}}\) and \({B}{C}{l}_{{{3}}}\)

(C) \({A}{l}{C}{l}_{{{3}}}\) and \({S}{i}{C}{l}_{{{4}}}\)

(D) \({P}{H}_{{{3}}}\) and \({S}{i}{C}{l}_{{{4}}}\)

(A) \({B}{C}{l}_{{{3}}}\) and \({A}{I}{C}{l}_{{{3}}}\)

(B) \({P}{H}_{{{3}}}\) and \({B}{C}{l}_{{{3}}}\)

(C) \({A}{l}{C}{l}_{{{3}}}\) and \({S}{i}{C}{l}_{{{4}}}\)

(D) \({P}{H}_{{{3}}}\) and \({S}{i}{C}{l}_{{{4}}}\)

A decapeptide (Mol. Wt. 769) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine.

Glycine contributes \({47.0}\%\) to the total weight of the hydrolysed products. The number of glycine units. Present in the decapeptide is.

Glycine contributes \({47.0}\%\) to the total weight of the hydrolysed products. The number of glycine units. Present in the decapeptide is.

What are the factors affecting the rate of diffusion?

In the given figure, ?1 and ?2 are supplementary angles. If ?1 is decreased, what changes should take place in ?2 so that both the angles still remainsupplementary.

The human body has an average temperature of \({98}^{{\circ}}{F}\).Assume that vapour pressure of the blood in the veins beahaves like that of pure water. Find the minimum atmosphric pressure which is necessary to prevent the blood from boling. Use figure of the text for the vapour.

For particles of equal massses M move along a circle of radius R under th action of their mutual gravitational attraction. Find the speed of each particle.

A particle executes simple harmonic motion with a frequency v. The frequency with which the kinetic energy oscillates is

(A) \(\frac{{v}}{{2}}\)

(B) v

(C) 2v

(D) zero

(A) \(\frac{{v}}{{2}}\)

(B) v

(C) 2v

(D) zero

A diverging lens of focal length 12 cm and a converging mirror of focal length 10 cm are placed coaxially at a separation of 5 cm. Where should an object be placed so that a real image is formed at the object itself ?

An ideal gas \({\left(\frac{{C}_{{p}}}{{C}_{{v}}}=\gamma\right)}\) is taken through a process in which the pressure and volume vary as \({\left({p}={a}{V}^{{{b}}}\right.}\). Find the value of b for which the specific heat capacity in the process is zero.

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