Archives

Globally Important Agricultural Heritage Systems (GIAHS)

A GIAHS is a living, evolving system of human communities in an intricate relationship with their territory, cultural or agricultural landscape... View Article

04 July 2021: The Hindu Analysis

UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 04th Jul 2021. Important news and views to boost... View Article

Deficiency of vitamin K causes

Deficiency of vitamin K causes: a. Cheilosis b. Increase in blood clotting time c. Increase in the fragility of RBCs d. Decrease in blood... View Article

Match List-I and List-II:

Match List-I and List-II: List-I List-II (a) Be (i) treatment of cancer (b) Mg (ii) extraction of... View Article

The oxidation states of nitrogen

The oxidation states of nitrogen in NO, NO2, N2O and NO3– are in the order of a. NO2 > NO3– > NO > N2O b. N2O > NO2 >... View Article

In the reaction of hypobromite with amide, the carbonyl carbon is lost as:

In the reaction of hypobromite with amide, the carbonyl carbon is lost as: a. HCO3– b. CO32– c. CO2 d. CO Answer: (b) CO32–... View Article

In the following molecule:

In the following molecule: The hybridisation of Carbon a, b and c respectively are: a. sp3, sp2, sp2 b. sp3, sp2, sp c. sp3, sp, sp d.... View Article

The first ionization energy of magnesium

The first ionization energy of magnesium is smaller as a compound to that of elements X and Y but higher than that of Z. The elements X, Y and Z,... View Article

An organic compound “A” on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution. Compound A is:

An organic compound “A” on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution. Compound A... View Article

Consider the given reaction

Consider the given reaction, percentage yield of: a. A > C > B b. B > C > A c. C > B > A d. C > A > B Answer: (c)... View Article

Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are:

Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are: Answer: (d) hence the answer is d... View Article

Match List-I with List-II:

Match List-I with List-II: List-I (Class of Chemicals) List-II (Example) (a) Antifertility drug (i) Meprobamate... View Article

Match List-I with List-II:

Match List-I with List-II: List-I List-II (a) Mercury (i) Vapour phase refining (b) Copper (ii)... View Article

The oxide that shows a magnetic property is:

a. SiO2 b. Na2O c. Mn3O4 d. MgO Answer: (c) Mn3O4 is paramagnetic due to the presence of unpaired electrons.... View Article

The charges on the colloidal CdS sol. and TiO₂ sol. are, respectively

a. positive and negative b. negative and negative c. negative and positive d. positive and positive Answer: (c) CdS → Sulphide sol. →... View Article

0.01 moles of a weak acid HA

0.01 moles of a weak acid HA (Ka = 2.0 × 10–6 ) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA... View Article

In the above reaction, 3.9 g of benzene

In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is... View Article

The mole fraction of a solute

The mole fraction of a solute in a 100 molal aqueous solution is _____ × 10–2 . (Round off to the Nearest Integer). [Given : Atomic... View Article

The pressure exerted by a non-reactive gaseous mixture

The pressure exerted by a non-reactive gaseous mixture of 6.4 g of methane and 8.8 g of carbon dioxide in a 10 L vessel at 27°C is _____ kPa.... View Article

For a certain first-order reaction

For a certain first-order reaction 32% of the reactant is left after 570s. The rate constant of this reaction is _______ × 10–3 s... 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	31