Lecturer Chemistry Past Paper 14-03-2013 by SPSC

Q11: Which of the following is not member of the transition metal?

مندرجہ ذیل میں سے کون سا منتقلی دھات کا ممبر نہیں ہے؟

The titanium family

The scandium family

The beryllium family

None of these

Q12: The element having valance shell electronic configuration is 3s² 3p⁵ that belongs to _____?

2nd period, VA group

3rd period, VIIA group

5th period, IIIA group

None of these

Q13: Bohr model defines angular momentum as 1= nh/2π, but in Schrodinger wave mechanics it is ______?

√l(l + 1) h/2π

√l(l + 2) h/2π

√l(l + 3) h/2π

None of these

Q14: Which one of the following principal quantum numbers has largest, s orbital?

مندرجہ ذیل میں سے کون سا پرنسپل کوانٹم نمبر سب سے بڑا ، مداری ہے؟

n=4

n=3

n=2

None of these

Q15: Axial lengths and inter-axial angles of a unit cell of crystals are known as _____?

محوری لمبائی اور کرسٹل کے یونٹ سیل کے بین محوری زاویوں کو _____ کے نام سے جانا جاتا ہے؟

Crystal system

Coordination number

Lattice constants

None of these

Q16: When H^+ ion concentration of solution in 1 × 10^-8 pH of that solution will be _____?

8

5

10

None of these

Q17: Ethyne can be prepared using 1, 2-dibromoethane as starting material. What else is used in preparation?

H2 gas

Alcoholic KOH

KMnO4

None of these

Q18: What would be the transmittance reading on a spectrophotometer at 0.25 absorbance?

0.65 T

0.75 T

0.56 T

None of these

Q19: In chromotherapy the mobile phase is called _____?

کروموتھراپی میں موبائل مرحلے کو _____ کہا جاتا ہے؟

Fluent

Elution

Eluate

None of these

Q20: What type of sample cuvette should be used for measuring the absorbance of a molecule at 220 nm?

دو سو بیس ینیم پر انو کے جذب کی پیمائش کے لئے کس قسم کے نمونہ کیویٹ کو استعمال کیا جانا چاہئے؟

Glass

Quartz

Plastic

None of these