The gas liberated when sodium carbonate reacts with dilute hydrochloric acid is

• Hydrogen

• Chlorine

• Nitrogen dioxide

• Carbon dioxide

Tags

NGSS.MS-PS1-2

An alloy made up of copper and tin is

• Brass

• Solder metal

• Bronze

• Stainless steel

The part of human brain that controls the involuntary actions like salivation and blood pressure is

• Pons

• Medulla

• Cerebrum

• Cerebellum

The wings of bat and pigeon are the examples of

• Analogous organs

• Vestigial organs

• Homologous organs

• Adaptive organs

Tags

NGSS.MS-LS4-2

As the electrical resistivity of a substance increases

• Resistance decreases

• Conductivity increases

• Melting point decreases

• Resistance increases

A major component of bio gas is

• Ethane

• Methane

• Butane

• Propane

Tags

NGSS.HS-LS2-3

The safety device used to protect the electric circuit and electric appliances is

• Ammeter

• Fuse

• Commutator

• Galvanometer

The power plant that does not use turbine to generate electricity is

• Solar power plant

• Nuclear power plant

• Hydroelectric power plant

• Thermal power plant

The amphoteric oxide among the following is

• Sodium oxide

• Zinc oxide

• Calcium oxide

• Potassium oxide

The blood vessels that carry blood from all parts of the human body to the heart

• Arteries

• Capillaries

• Veins

• Pulmonary arteries