Chemistry Questions

1. Which of the following best describes the diagram below of a molecular orbital ?

JEE Main 2018 Chemical Bonding and Molecular Structure

2. Glutaric acid is

KEAM 2015 Aldehydes Ketones and Carboxylic Acids

3. Which one of the following ores is best concentrated by froth-flotation method ?

JEE Main 2016 General Principles and Processes of Isolation of Elements

7. 1-Butyne reacts with cold alkaline KMnO4 to produce

AIIMS 1997 Aldehydes Ketones and Carboxylic Acids

10. Gold is extracted by hydrometallurgical process, based on its property_______

KCET 2005 General Principles and Processes of Isolation of Elements

11. A cross-linked polymer is

JIPMER 2014 Polymers

13. Which of the noble gas has highest polarizability

AFMC 2001 The p-Block Elements - Part2

15. Metal ion responsible for the Minamata disease is

WBJEE 2014 The d-and f-Block Elements

16. Reduction of the lactol S with sodium borohydride gives

WBJEE 2017 Alcohols Phenols and Ethers

17. The compound that is most difficult to protonate is:

NEET 2019 Alcohols Phenols and Ethers

18. Among the following orbital bonds, the angle is minimum between

AIPMT 1994 Chemical Bonding and Molecular Structure

19. The pH of $\ce{0.5 \, M \, H_2 SO_4}$ is

COMEDK 2008 Equilibrium

20. The reaction of Ethanol with $H_2SO_4$ does not give

Madhya Pradesh PMT 1996 Alcohols Phenols and Ethers

21. Identify the incorrect statements, regarding the molecule $XeO_4$ :

NEET 2013 The p-Block Elements - Part2

25. In acidic medium, which of the following becomes colourless?

AIIMS 2018 The d-and f-Block Elements

27. Which of the following is a carbonate ore?

AIIMS 2005 General Principles and Processes of Isolation of Elements

30. The enzyme present in saliva is

Punjab PMET 2004 Biomolecules