1 tonne = _____ kg?
Main use of salt in diet is to : __________?
Rainbow is seen after rain because of hanging molecules of water which act as __________?
To measure the speed of an approaching car a police officer shines?
A photostat machine works on __________?
The owl can see most clearly in total darkness because:
The audio signals of TV are __________?
The source of the Sun’s energy is the process of __________?
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
Soap is prepared by boiling caustic soda with __________?
Milk tastes sour when kept in the open for sometime due to the formation of __________?
Which of the following statements is true when we see ‘rainbow’ ?
Rain drops fall from great height Which among the following statements is true regarding it?
Why the needle of iron swims on water surface when it is kept gently ?
Which among the following waves is used for communication by artificial satellites ?
Erythrocyte is another name for a __________?
Hydrology is the study of __________?
Which of the following is good conductor of heat but bad conduct of electricity?
Kilowatt-hour is a unit of__________?
The blood pressure is denoted as following?
Which of the following are not deflected by electric and magnetic fields ?
Weather and climate are driven by what source(s) of energy ?
Volcanoes can also be caused by _____ so called ‘hot spots’.
Volcanoes are usually located on ________?
Which ocean does not commonly experience tropical cyclones ?
The value of acceleration due to gravity is minimum on which of these planets?
Which of the following is mainly used for light patrol engines ?
Which of the following is liquid fuel ?
pH value of Blood or Red Blood Cells ?
pH value of water is _________?
What is the magnetic field at any point in the open space inside the toroid?
Study of fruit is called __________?
Which of the following Vitamin is required for Normal Blood Circulation ?
1 Meter = _________ millimeters?
1 Meter = _________?
An astronaut sees the colour of the sky as: _________?
The position of an element in the Periodic Table is determined by its __________ number?
Which among the following is correct about Saliva of a Healthy Human?
Which of the Following Hormones Regulate Blood Sodium and Potassium Levels in the Body?
Calcium level in the blood is regulated by the: __________?
Which part of the brain controls the Pituitary Gland?
The process which is essential for continuing and survival of species is __________?
The part of brain involved in balance and precision in movements is: __________?
Which one of the following waves are used by the common TV remote control?
Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?
What is the largest cell in the human body?
Total number of moons in entire Solar System are:__________?
Wireless transmission can be done via __________?
The Aurora Borealis, also known as ________?
Which one of the following elements the drum of a Photostat machine is made up of: _________?

The chemical name of chalk is

A. Sodium nitrate
B. Zinc sulfate
C. Sulphuric acid
D. Calcium carbonate

Submitted by: Farjan Ahmed Soomro

Calcium carbonate (also known as chalk), mined as calcite, is the most commonly used filler for PVC.

Correct Answer: Calcium carbonate ✔

Last Updated: February 17, 2022