19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following is the correct statement ?
The hardest compound of boron is:
Boron cannot form which one of the following anions? (a) BF- (b) BH-
NaBH4 + I2 ® X + Y + Z BF3 + NaH 450 K ¾¾¾® X + P BF3 + LiAlH4 ® X + Q + R X, Y, Z, P, Q and R in the reactions are X Y Z P Q R (a) Na4B4O7 NaI HI HF LiF AlF3 (b) B2H6 NaI H2 NaF LiF AlF3 (c) B2H6 BH3 NaI B3N3H6 Al2F…
Boron nitride can be represented by the given structure. The structure of BN is similar to
The bonds present in borazole are:
Which of the following compounds is known as inor- ganic benzene?
Borazole, B3N3H6 is related to benzene as:
In B2H6:
Which one of the following compounds is most explosive?
In how many of the following number of lone at central atom is zero XeO3, XeO2F2, XeO4, XeO3F2, XeO3F6 ? (AIIMS2019)
Which of the following inert gas participate in chemicals reaction? (AIIMS 2019)
Which of the following statements is not true for halogens? (NEET 2019)
A green yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fireworks and safety matches. The gas and halite are, respectively (AIIMS 2019)
What is X and Y in the above reaction? (AIIMS 2019) (Excess) (Excess) 8NH 3Cl X NH 3Cl Y -> ->
Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acids should have highest bond dissociation enthalpy? (AIIMS 2019)
Yellow colour of chlorine water fades because of (AIIMS 2019)
Correct order of bond dissociation energy is (AIIMS 2019)
A gas ‘X’ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here, the gas X is (AIIMS 2018)
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)
In which of the following compounds, sulphur show maximum oxidation number? (JIPMER 2017)
Among the following compounds, which will produce POCl3 with PCl5? (JIPMER 2017)
Which of the following oxide is most acidic? (JIPMER 2017)
Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other? (CBSE AIPMT 2015)
The gaseous product formed when HOCl reacts with H2O2 in acidic medium is (Kerala CEE 2014)