A radioactive sample at any instant has its disintegration rate of 5000 disintegrations per minute. After 5 minutes, the rate is 1250 disintegrations per minute. The decay constant per minute is:
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
The term anomers of glucose refers to:
White Phosphorous is represented by which among the following symbols?
For a galvanic cell, which of the following statements is never true?
The most electropositive elements among the following is :
Which among the following are constituents of Brass?
Domestic cooking gas consists of mostly:
The standard Gibbs energy change at 300 K for the reaction 2A B + C is 2494.2 J. At a given time, the composition of the reaction mixture is [A] = 1/2, [B] = 2 and [C] = 1/2. The reaction proceeds in the :[R = 8.314 J/K/mol, e = 2.718]:
Which one has the highest boiling point?
A drop of food coloring spreading out in a cup of water is an example of which transport process?
Which one of the following pairs is mismatched
The cyclotron is used to:
The inexpensive and commonly used variety of glass is called soda glass. It is called so because:
The National Chemical Laboratory is situated in:
The synthesis of alkyl fluorides is best accomplished by :
Which of the following can be used for removal of stains of rust on clothes?
(1) H2O2 (2) Oxalic acid
(3) Petrol (4) Alcohol
X-ray beam coming from an X-ray tube will be:
What is used to avoid melting of ice ?
The monomer of polythene is:
The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is:
Hubble’s law is based on the:
Which of the vitamins given below is water soluble ?
Which of the following pairs are correctly matched?
(1) Isotopes : Atoms with same atomic number but different atomic mass.
(2) Isobars : Atoms with same number of neutrons but different atomic number.
(3) Isotones : Atoms with same mass number but different atomic number.
Select the correct answer using the codes given below :
Which of the following is/are not correctly matched?
(I) Absolute alcohol – 100% ethanol
(II) Power alcohol – 90 – 95% ethanol
(III) Rectified spirit – 5% ethanol
Consider the following statements:
If there were no phenomenon of capillarity
(1) It would be difficult to use a kerosene lamp.
(2) One would not be able to use a straw to consume a soft drink.
(3) The blotting paper would fail to function.
(4) The big trees that we see around would not have grown on the earth.
Which of the statements given above are correct?
The correct order of these fuels in terms of their
calorific value in increasing order is
(1) Hydrogen gas (2) Kerosine oil
(3) Charcoal (4) Wood
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The inert gases are ____________ in water.
The most electronegative element among the following is :
Which of the following is / are correct statements about Inert Gases?
(1) They have Zero Valency
(2) They don’t undergo chemical reactions
Select the correct option from the codes given below: