Which of the following statements in relation to the hydrogen atom is correct?
Which among the following acids is abundant in Grapes, Bananas and Tamarind?
Which element found in all organic compounds ?
The ore which is found in abundance in India is:
Contact lenses are made from ?
Which is not a type of elements ?
Which of the five isomeric hexanes, the isomer which can give two monochlorinated compounds?
The octane number of zero is assigned to:
The ionic mobility of alkali metal ions in aqueous solution is maximum for:
In Periodic table vertical columns are called ____________.
A pressure vessel contains a gaseous mixture made up of 2.34 kg silane, SiH4, and 55.4 kg argon. Determine the mole fraction of silane.
In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is(at. mass Ag = 108; Br = 80):
Which one of the following metals does not react with water to produce Hydrogen?
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called:
Identify the wrong statement in the following?
The synthesis of alkyl fluorides is best accomplished by :
Which is used in preparation of dynamite ?
Which of the following statements about diamond are correct?
(1) It is used as a gem in jewellery because of its ability to reflect light.
(2) It is good conductor of electricity.
(3) It is used for cutting glass, marble stones and other hard materials.
(4) It is used for drilling of rocks.
Select the correct answer using the codes given below :
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?
Which of the following is produced during the formation of photochemical smog ?
Lodine can be separated from a mixture of Iodine and Potassium Chloride by ?
What among following is used to produce artificial rain ?
After any chemical reaction ____________.
Consider the following statements: Hard water is not suitable for
(1) Drinking
(2) Washing clothes with soap
(3) Use in boilers
(4) Irrigating crops
Which of these statements are correct?
Which among the following is called Laughing Gas popularly?
Which among the following oxides cause the Acid rain ?
The molecular shapes of SF4, CF4 and XeF4 are:
Protons in a high-field nuclear magnetic resonance spectrometer resonate at frequencies close to 800 MHz. Calculate the strength of the magnetic field of the spectrometer.
Which of the following does not increase when we move from left to right along a period in the periodic table?