Chemistry

”Equal volumes of all gases at the same temperature and pressure contain the same number of molecules” is an expression of?

A. Charles Law B. Boyle's Law C. Avogadro's Law D. Graham's Law E. Gay Lussac's Law Correct Answer: Option C…

5 years ago

What is the likely formula of compound formed between element M in group two and element X in group seven?

A. M7X2 B. M2X C. M2X7 D. MX2 E. MX6 Correct Answer: Option D - MX2

5 years ago

The alkali metals exhibit similar chemical properties because?

A. they occur in the combined state B. they have the same number of valence electrons C. they form crystalline…

5 years ago

When an atom gains an electron, it becomes properties

A. chemically inactive B. negatively charged C. oxidized D. a cation E. a complex ion Correct Answer: Option B -…

5 years ago

The existence of two or more forms of the same element in the same physical state is known as?

A. allotropy B. resonance C. hybridization D. isotopy E. isomerism Correct Answer: Option A - allotropy Explanation Allotropy or allotropism…

5 years ago

What is the basicity of the acid in the followed reaction? NaOH + 2CH3COOH → 2CH3COONa + H2O + CO2

A. 1 B. 2 C. 3 D. 4 E. 8 Correct Answer: Option A - 1

5 years ago

A mixture of NaCI(s) and CaCO3(s) is best separated by?

A. dissolution followed by filtration B. sublimation followed by crystallization C. dissolution followed by evaporation D. dissolution followed by crystallization…

5 years ago

Which of the following Group 1 elements has the highest ionization energy?

A. 55Cs B. 37Rb C. 19K D. 11Na E. 3Li Correct Answer: Option E - 3Li

5 years ago

Which of the following statements is correct about sodium chloride in the solid state?

A. it exists as aggregates of ions B. it conducts electricity C. its melting point is below 100oC D. it…

5 years ago

The valence electrons of element 12Mg are in the?

A. 1s orbital B. 2s orbital C. 2px orbital D. 2py orbital E. 3s orbital Correct Answer: Option E -…

5 years ago
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