Archives

If L₁ is the line of intersection of the planes 2x-2y+3z-2 = 0, x-y+z+1 = 0 and L₂ is the line of intersection of the planes x+2y-z-3 = 0, 3x-y+2z-1 = 0, then the distance of the origin from the plane, containing the lines L₁ and L₂ is

a) 1/2√2b) 1/√2c) 1/4√2d) 1/3√2Solution:L1 = = 3/√162= 1/3√2Answer: (d)... View Article

If the tangent at (1, 7) to the curve x² = y-6 touches the circle x²+y²+16x+12y+c = 0, then the value of c is

a) 85b) 95c) 195d) 185Solution:Equation of tangent at (1, 7) to x2 = y-6 is 2x-y = -5.It touches circle x2+y2+16x+12y+c = 0.Hence length of... View Article

The mass percentage of nitrogen in histamine is:

Solution: Molecular mass of Histamine= 111 In Histamine, 3 nitrogen atoms are present (42g) The percentage of nitrogen by mass in Histamine =... View Article

108 g silver (molar mass 108 g mol-1) is deposited at cathode from AgNO₃(aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273K and 1 bar pressure from water by the same quantity of electricity is

Solution: On applying Faraday’s 1st law, Moles of Ag deposited= 108/108= 1 mol. Ag+ + e- -> Ag 1Faraday is required to deposit 1 mole of Ag.... View Article

How much amount of NaCl should be added to 600 g of water (ρ = 1.00 g/mL) to decrease the freezing point of water to -0.2°C? (The freezing point depression constant for water = 2 K Kg mol-1)

Solution: NaCl is strong electrolyte and gives 2 ions in the solution. This implies, i = 2. Molarity = (w×1000)/58.5×600 ΔTf = 0.20C ΔTf = i... View Article

The hardness of a water sample containing 10^-3 M MgSO₄ expressed as CaCO₃ equivalents (in ppm)is (molar mass of MgSO₄ is 120.37 g/mol)

Solution: Hardness of water is measured in ppm in terms CaCO3. nCaCO3 = nMgSO4 ppm is the parts (in grams) present per million i.e, 106... View Article

The molarity of HNO₃ in a sample which has density 1.4 g/mL and mass percentage of 63% is :(Molecular weight of HNO₃= 63).

Solution: %w/w = 63% ρ = 1.41g/mL M = ((%w/w)× ρ× 10)/MM = (63×1.4×10)/63 = 14 mol/L Answer: (14)... 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

Archives

If L₁ is the line of intersection of the planes 2x-2y+3z-2 = 0, x-y+z+1 = 0 and L₂ is the line of intersection of the planes x+2y-z-3 = 0, 3x-y+2z-1 = 0, then the distance of the origin from the plane, containing the lines L₁ and L₂ is

If the tangent at (1, 7) to the curve x² = y-6 touches the circle x²+y²+16x+12y+c = 0, then the value of c is

The mass percentage of nitrogen in histamine is:

108 g silver (molar mass 108 g mol-1) is deposited at cathode from AgNO₃(aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273K and 1 bar pressure from water by the same quantity of electricity is

How much amount of NaCl should be added to 600 g of water (ρ = 1.00 g/mL) to decrease the freezing point of water to -0.2°C? (The freezing point depression constant for water = 2 K Kg mol-1)

The hardness of a water sample containing 10^-3 M MgSO₄ expressed as CaCO₃ equivalents (in ppm)is (molar mass of MgSO₄ is 120.37 g/mol)

The molarity of HNO₃ in a sample which has density 1.4 g/mL and mass percentage of 63% is :(Molecular weight of HNO₃= 63).

Identify (A) in the following reaction sequence

A chemist has 4 samples of artificial sweetener A, B, C and D….

The increasing order of basicity for the following intermediates is

The correct order of heat of combustion for following alkadienes is

The major product (Y) in the following reactions is

Which of these will produce the highest yield in Friedel-Craft’s reaction?

The major product Z obtained in the following reaction scheme is:

‘X’ melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is:

For following reactions, find the activation energy for catalysed reaction

According to the following diagram, A reduces BO₂ when the temperature is:

The spin-only magnetic moment and crystal field stabilisation energy

B has a smaller first ionization enthalpy than Be. Consider the following statements:

The compound that cannot act both as oxidising and reducing agent is

FREE TEXTBOOK SOLUTIONS