BPSC Chemistry Lecturer Past Papers

Elements having zero nuclear spin cannot be directly determined at?

1. NMR spectroscopy
2. Atomic Absorption spectroscopy
3. IR spectroscopy
4. HPLC

The number of electrons involved in oxidation of glucose to gluconic acid are?

1. 3.5
2. 2.2
3. 5.2
4. 2

Which of the following is not a transition metal complex?

1. K2Cr2O7
2. K4[Fe(CN)6]
3. K3[Fe(CN)6]
4. [Ni(H2O)6]SO4

Pure water could be obtained from seawater by?

1. Filtration
2. Chromatography
3. Distillation
4. Centrifugation

Which set of hybrid orbitals of carbon is used by each oxygen in forming H2CO3?

1. sp3
2. sp2
3. sp
4. dsp2

The catalyst in Friedel-Crafts alkylation is?

1. AlCl3
2. FeCl3
3. Pt
4. I2

Oxidation of secondary alcohols produces

1. Aldehydes
2. Ketones
3. Ethers
4. Esters

____ are carboxylic acid with long hydrocarbon chain.

1. Fats
2. Lipids
3. Fatty acids
4. Proteins

The rate at which hydrogen is used in the reaction. N2(g) + 3H2(g) → 2NH3(g) is 1.72 mol H2.L^-1.h^-1. What is the rate (in mol N2.L^-1.h^-1) at which nitrogen is used?

1. 0.86
2. 1.76
3. 0.57
4. 5.16

The Lowry and Bronsted theory describes that Urea is amphiprotic solvent. If it reacts with ammonia then it acts as?

1. Acid to form
2. Base to form
3. Neutral to form
4. Amphoteric to form

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