Catalyst used in the production of high density polythene by low pressure Ziegler process is

Low density polythene as compared to high density polythene is

A

Harder

B

Tougher

C

Chemically inert

D

More flexible

An object X sinks in liquids P and Q but floats in liquid R. Which of the following conclusions can be made from these observations? A) Density of X is more than the density of P B) Density of X is less than the density of R C) Density of P is equal to the density of R D) Density of P is less than the density of R

A

A, B, C

B

A, B, D

C

B, C, D

D

A, C, D

Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is

A

Ni

B

V₂O₅

C

Fe

D

Aluminium triethyl combined with titanium tetrachloride

Which of the following materials is best suited to make a fuse wire? Material Melting Point Resistivity X High Low Y High High Z Low High W Low Low

A

X

B

Y

C

Z

D

W

The influence of shape of aggregate in strength and workability of concrete are given below in statements S1, S2, S3 and S4. Which of the statements are correct? S1: Rounded aggregate produces concrete with high workability and low strength. S2: Angular aggregate produces concrete with high workability and low strength. S3: Rounded aggregate produces concrete with low workability and high strength. S4: Angular aggregate produces concrete with low workability and high strength.

A

S3 and S4

B

S2 and S3

C

S1 and S2

D

S1 and S4

For an instrumentation amplifier, the following parameters are given (a) High input resistance and low power consumption (b) Low input resistance and low power consumption (c) High CMRR and high slew rate (d) Low CMRR and high slew rate Which of the given parameters are a major requirement for an instrumentation amplifier?

A

(a) and (d)

B

(b) and (c)

C

(a) and (c)

D

(c) and (d)

Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is

A

7 kgf/cm² and 70°C

B

1000 kgf/cm² and 100°C

C

7 kgf/cm² and 700°C

D

1 kgf/cm² (gage) and 70°C

In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

A

Equal to

B

Less than

C

More than

D

None of these

Density of low density polythene is about __________ gm/c.c.

A

0.38

B

0.56

C

0.81

D

0.91

When a polythene tube is rubbed with a woollen cloth, the polythene tube

A

becomes negatively charged while the cloth has a positive charge

B

and the cloth both acquire negative charge

C

becomes positively charged while the cloth has a negative charge

D

and the cloth both acquire positive charge

Catalyst used in the production of high density polythene by low pressure Ziegler process is

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