Questions

Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?

Calculate a country's GDP if for the year, consumer spending is $400 million, government spending is $150 million, investment by businesses is $80 million, exports are $35 million and imports are $40 million.

Which of the following represents the pair of sex chromosomes in women?

The percentage of carbon in CO2 is

In which month does the Earth's Perihelion position occur?

The ratio of angles of a triangle are 1 : 2/3 : 3. Then the smallest angle is

In figure, DE || BC. If DE = 3 cm, BC = 6 cm and area of ΔADE = 15 sq cm, then the area of ΔABC is

The height of a tower is 50√3 m. The angle of elevation of a tower from a distance 50 m from its feet is