Important General Knowledge Question Answer

Important General Knowledge Question Answer

# Who discovered the electron?
sir j.j thomas
# Which is the longest bone in the human body?

The femur or the thigh bone.
# At which temperature do both the Centigrade and Fahrenheit show the same reading?

-40c=-40F

# Who invented the bifocal lens?

Benjamin Franklin
# Why we do not feel pains to cut our nails?

Nails are not connected with cartilages or blood vessels. While cutting, therefore, the nervous system is not affected.
# Who invented the jet engine?

Sir Frank Whittle of England in 1937
# What is Mach Number?

Ratio of speed of the body to the speed of sound under similar conditions.
# What is the scientific name for study of handwriting?

Graphology
# What causes an object to look black?

When radiation falling on an object is fully absorbed, it appears black
# Who discovered insulin?

Sir Frederick Grant Banting & J J R Macleod
# Which element has the highest boiling point?

Tantalum, about 6000C
# Why does a tennis ball bounce higher on hills than on plains?
The gravitational pull in the hills is less than that at plains
# Which planet has the biggest satellite?

Saturn's seventh, known as Titan (diameter 5680 km)
# How do bats manage to avoid obstacles while flying?

Bats while flying, emit a set of short squeaks which are ultrasonic waves. These, after reflection from trees and buildings reach the ear of the bats and make them judge, by hearing the echo of the ultrasonic sound, the distance and direction of the obstacle in the air.
# Which is the most common of all the metals in the earth's crust?

Aluminum, 8.13% of the earth's crust by weight
# What is the source of caviar?

It is made by salting the roe of sturgeon
# Why does an iron ball sink and not an iron ship?

The weight of the iron ball is more than the water it displaces, in case of the ship, it is opposite.
# What is herpetology?

Study of reptiles
# What is constellation?

A cluster of fixed stars in the heaven like Great Bear, Orion
# What is an aardvark?

An ant-eating animal
# From which plant is morphine obtained?

Opium poppy
# Who discovered the cause of malaria?

Ronald Ross
# What makes Mexican jumping beans jump?

The seeds are inhabited by the larvae of a small moth whose movements cause the seeds to jump about.
# In plants, what is chlorophyll?

Photosynthetic pigments which absorb blue-violet and red right, hence, reflecting green light and giving the green color of plants.
# Why is the color of any root white?

Because of the absence of chlorophyll which will only appear if the plant is exposed to light.
# How do we term plants specially adapted to capture and digest insects?

As insectivorous.
# To which family of plants does the apple belong?

The rose family.
# In which country is tea first believed to have been cultivated?

South China.
# What part of the plant is the clove that we use as a spice?

The dried bud.
# What is known as ‘vegetable gold’?

Saffron.
# Which vegetable contains the most iron?

Spinach, 100gm of which may contain as much as 2.2gm of iron.
# To which botanical family does the onion belong?

The lily family (Allium cepa).
# Which scientist received Nobel Prizes for both Chemistry and Peace?

Linus Pauling.
# Who invented the vacuum flask?

James Dewar (U.K.) in 1892.
# With which important invention is the name of Leeuwenhoek associated?

The microscope
# Which Russian born American is so famous for research connected with television that he has been described as ‘the father of modern television’?

Vladimir Zworykin.
# What branch of chemistry is concerned with carbon compounds?

Organic Chemistry.