निम्नलिखित में से कौन 'सूखा बर्फ' कहलाता है ?
Which of the following is called 'dry ice'?
Comprehensive collection of questions from General Science asked in recent state service examinations. Each question is verified with official answer keys and step-by-step bilingual solutions.
Which of the following is called 'dry ice'?
Which of the following is made entirely of carbon?
Lead pencil contains:
Which of the following elements does not contain neutrons in its nucleus?
Which of the following causes maximum indoor chemical pollution?
Pencil lead is made of:
Which of the following materials is the strongest?
Which lubricant is used for heavy machinery?
Which of the following elements forms the maximum number of compounds?
Graphene is:
The amount of carbon is maximum in:
Which of the following does not contain carbon?
Chemically, dry ice is:
Heavy water is that water:
Which of the following gases is called a 'Noble Gas'?
The substance used as both a moderator and a coolant in nuclear reactors is:
An element X has four electrons in its outermost shell. What will be the formula of its compound with hydrogen?
By which process does alum clean turbid/dirty water?
One mole (gram molecule) of hydrogen gas burns in excess oxygen to produce 290 kJ of heat. Under the same conditions, how much heat will be generated by burning 4 grams of hydrogen gas?
The chemical formula of heavy water is:
The molecular weight of heavy water is:
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?
The pH value of water is:
Who among the following discovered heavy water?
Water gas is a mixture of: