निम्नलिखित में से कौन-सा एक पदार्थ बहुत कठोर और बहुत तन्य है?
Which one of the following materials is very hard and very ductile?
Collection of verified questions for Dhatuyen Khanij Ayask under General Science. Includes previous year exam questions with official answer keys and step-by-step solutions.
Which one of the following materials is very hard and very ductile?
Which of the following is the heaviest metal?
'Plaster of Paris' is made of -
What is a mineral?
The heaviest naturally occurring element is-
Assertion (A): Sodium metal is stored in kerosene. Reason (R): Sodium metal melts when exposed to air. Code:
Gold can be dissolved in-
'Plaster of Paris' is chemically-
Pearl is mainly composed of-
In which of the following substances is calcium present?
Sodium vapour lamps are commonly used as street lights because-
The extremely soft mineral, Talc (soapstone), is mainly-
Pure gold is of how many carats?
Mercury is commonly used in thermometers because of its characteristic of:
The most commonly used substance in a fluorescent tube is-
In which of the following industries is mica used as a raw material?
Which of the following elements is kept preserved in kerosene oil?
Plaster of Paris is used to set broken bones. It is -
Which of the following electronic configurations represents a metallic element?
Which of the following is the hardest element?
The chemical formula of Plaster of Paris is-
How are ruby and sapphire chemically known?
The main constituents of pearl are-
Which recently discovered metal/material is the most expensive in the world?
Nowadays yellow lamps are frequently used in street lights. Which of the following is used in these lamps?