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Among the following, the number of metal/s which can be used as electrodes in the photoelectric cell is _____(Integer answer).

a. Li b. Na c. Rb d. Cs Answer: (d) Cs is used in photoelectric cells due to its very low ionization potential.... View Article

Five moles of an ideal gas at 293 K is expanded isothermally from an initial pressure of 2.1 MPa to 1.3 MPa against a constant external 4.3 MPa. The heat transferred in this process is ____kJ mol^-1. (Rounded-off of the nearest integer)

[Use R = 8.314 J mol-1 K-1] Answer: 15 Moles (n) = 5 T = 293 K Process = Iso T. → Irreversible Pini = 2.1 M Pa Pt = 1.3 M Pa Pext = 4.3 mPa... View Article

Copper reduces into NO and NO₂ depending upon the concentration of HNO₃ in solution. (Assuming fixed [Cu²⁺] and P_NO=P_NO2), the HNO₃ concentration at which the thermodynamic tendency for reduction of into NO and NO₂ by copper is same is 10^x M.

The value of 2x is ______. (Rounded-off to the nearest integer) [Given: ] Answer: 4 Anode Cu(s) → Cu+2 + 2e- Cathode (1) log (HNO3) =... View Article

Consider titration of NaOH solution versus 1.25 M oxalic acid solution. At the end point following burette readings were obtained.

(i) 4.5 mL (ii) 4.5 mL (iii) 4.4 mL (iv) 4.4 mL (v) 4.4 mL If the volume of oxalic acid taken was 10.0 ml. then the molarity of the NaOH... View Article

The unit cell of copper corresponds to a face centered cube of edge length 3.596 Å with one copper atom at each lattice point. The calculated density of copper in kg/m³is ______.

[Molar mass of Cu : 63.54 g; Avogadro number = 6.022×1023] Answer: 9077 a = 3.596 Å d = 0.9076 × 104 = 9076.2 kg/m3... View Article

The number of compound/s given below which contain/s —COOH group is ______

a. Sulphanilic acid b. Picric acid c. Aspirin d. Ascorbic acid Answer: (a) Hence the answer is a... View Article

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____BM.

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____BM. Answer: 2 29Cu+2 → [Ar]183d9 No. of... View Article

If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the boiling point of the solution is ______molal.

(Rounded-off to the nearest integer) [Kb =0.52 K kg mol-1] Answer: 3 AB → A+ + B- 1 - α α α α = 3 / 4 N = 2 i =... View Article

The solubility of Ca(OH)₂ in water is:

The solubility of Ca(OH)2 in water is: [Given: The solubility product of Ca(OH)2 in water = 5.5×10-6] a. 1.11 ×10-6 b. 1.77... View Article

Which of the following compound is added to the sodium extract before the addition of silver nitrate for testing of halogens?

Which of the following compound is added to the sodium extract before the addition of silver nitrate for testing of halogens? a. Nitric acid b.... View Article

Correct statement about the given chemical reaction is:

Correct statement about the given chemical reaction is: a. Reaction is possible and compound (A) will be a major product. b. The reaction will... View Article

Which among the following species has unequal bond lengths?

Which among the following species has unequal bond lengths? a. XeF4 b. SiF4 c. BF4- d. SF4 Answer: (d) The answer is d... View Article

The correct order of acid character of the following compounds is:

The correct order of acid character of the following compounds is: a. II>III>IV>I b. III>II>I>IV c. IV>III>II>I... View Article

Which of the following is correct structure of α-anomer of maltose

Which of the following is correct structure of α-anomer of maltose Answer: (d) Hence the answer is d... View Article

The method used for the purification of Indium is:

The method used for the purification of Indium is: a. Van Arkel method b. Vapour phase refining c. Zone refining d. Liquation Answer: (c)... View Article

The major components of German Silver are:

The major components of German Silver are: a. Cu, Zn and Mg b. Ge, Cu and Ag c. Zn, Ni and Ag d. Cu, Zn and Ni Answer: (d) Fact German... View Article

If which of the following orders the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?

If which of the following orders the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment? (i)... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30