Question 631 What is the unit for measuring the amplitude of a sound? A) Decibel B) Coulomb C) Hum D) Cycles No Details
Question 632 Washing soda is the common name for ? A) Sodium Carbonate B) Calcium Bicarbonate C) Sodium Bicarbonate D) Calcium Carbonate No Details
Question 633 The gas usually filled in the electric bulb is ? A) Nitrogen B) Hydrogen C) Carbon dioxide D) Oxygen No Details
Question 634 The device used for measuring altitudes is ? A) altimeter B) ammeter C) audiometer D) galvanometer No Details
Question 635 Which soil is suitable for agriculture ? A) Red soil B) Sand C) Black soil D) Peaty soil No Details
Question 636 Which gas is used for the preparation of Soda water ? A) Oxygen B) Carbon Dioxide C) Ammonia D) Hydrogen No Details
Question 637 Deficiency of Iron leads to ? A) Rickets B) Malaria C) Dental Cavity D) Anaemia No Details
Question 638 Which one of the following is an element ? A) Topaz B) Diamond C) Ruby D) Sapphire No Details
Question 639 Which planet takes maximum time for a revolution in the Sun? A) Jupiter B) saturn C) Mars D) Earth No Details