UGC NET Paper 1 — Chemistry
14 questions across 6 years
Public preview: answer keys and topic tags are available on many questions, while original explanations are being added selectively. Use the filters below for cleaner practice.
By year
By topic
Match the LIST-I with LIST-II LIST-I (Disinfectant byproducts (DBPs) of Chlorine) A. Dibromochloromethane B. Bromoform C. Bromodichloromethane D. Chloro form LIST-II (Chemical Comp...
Softening of hard water is done by A. Aeration B. Boiling C. Lime soda D. Ozonation E. Ion exchange Choose the correct answer from the options given below:
Temporary hardness in water is also known as:
Which of the following statements are true about hardness in water ? (A) It is caused by ions of calcium and magnesium (B) It is of two types-temporary and permanent (C) Permanent...
Photo-electro-chemical decomposition of water is done to 1. To produce hydrogen 2. To remove pathogens from water 3. To remove metals from water 4. To remove oil and grease from wa...
At pH values above 7.5, the disinfectant capability of chlorine is
Which of the following are true about the hard water? A. Hardness in water can occur in both surface and underground waters. B. Hardness increases the cleaning efficiency of water....
Hardness of water is caused by the presence of
What is the correct sequence of concentration of various components of producer gas? (A) CH4 (B) CO2 (C) CO (D) N2 Choose the correct answer from the options given below:
What is the correct order of concentration of various components of producer gas?
Which of the following are characteristics/properties of permanent hardness in water? A. Presence of bicarbonates of calcium and magnesium B. Presence of sulphates of calcium and m...
Given below are two statements Statement I: Methanol (CH3OH) also known as wood alcohol and has a much higher octane rating than gasoline. Statement II: Methanol burns with higher...
Given below are two Statements, one is labelled as Assertion A and other is labelled as Reason R. Assertion A: Carbon monoxide (CO) is a serious asphyxiate; even a short exposure m...
Identify the correct sequence of energy sources in terms of their heat of combustion in increasing order A. Methane B. Natural fats and oils C. Dry wood D. Green wood Choose the co...